On March 15 we asked everyone to help Petfinder adopt the internet for adoptable pets. And boy, did you ever!

On more than 300 websites and Facebook company pages, you spread the word about pet adoption. Countless numbers of you shared adoptable pets and adoption stories on Facebook and Twitter. You spread the message offline as well -- more than 2,200 of you took our pledge to tell at least one person about pet adoption on March 15.

And your efforts worked.

Our friends at VetLIVE.com e-mailed us that a visitor saw Adopt the Internet Day on their site and put in an application to adopt a dog because of it. Petfinder shelter-outreach specialist Susan Greene, who runs Wildrun cat rescue in Spencer, NY, says she got as many adoption inquiries on Tuesday as she normally gets in a week!

"It was wonderful to open my e-mail and see that many adoption messages on my adult and young adult cats," Susan adds. "As a small rescue, I normally would only get that many inquiries when I post a litter of cute and fuzzy kittens."

All of us at Petfinder were incredibly moved to see the enthusiastic and varied ways you helped spread the word about pet adoption. Here are just a few of the extra-creative efforts we saw on behalf of adoptable pets:

Helin Jung is an associate editor at PEOPLEPets.com. She adopted her dog, a senior Maltese named Ethel, from the Humane Society of New York in 2009. She lives in Queens.

At PEOPLEPets.com, we hear about lots of stars who love their pets, many of them shelter cats and dogs. But on Adopt the Internet Day, we think it's fitting to call out a few of the celebrities who go out of their way to speak out for homeless pets -- and do all they can to find forever homes for them. Meet them below:

Alyssa Milano
When the Twitter maven found out about Scooby-Roo, an abandoned, two-legged mutt with Fuzzy Recue in L.A., She helped get him a custom-made cart to help with his rehabilitation. Milano then invited the dog to her home, where Scooby-Roo wheeled around the yard and met the actress's 10 horses. And her fans know all about it: Milano often Tweets to her 1.4 million followers about pets in need of homes. Read more about Alyssa Milano and Scooby-Roo.

Today is Help Petfinder Adopt the Internet Day -- a day devoted to helping spread the word about pet adoption. Today we'll be featuring three new blog posts highlighting pet adoption in different ways. First up, the story of four little piggies.

Mealtime is a treat for Penny, Shyla, Nim and Jackson. When they see someone coming with their food, they wheek with delight. These four guinea pigs were lucky to find a family willing to take on a little herd of piggies so they all found a home together.

"After our beloved dog had died due to cancer, our family decided we wanted another pet in our home, but were not ready to commit to another dog," says Sarah Cornelius, the mother of the family, which lives in Whitby, ON.

After meeting some guinea pigs at a friend's, the family put cavies, another name for these lovable rodents, at the top of their list. "We didn't want to buy from a pet store," Sarah says. "We wanted to save the lives of those that needed a second chance." Through the magic of the Internet and Petfinder.com, they found Piggles Guinea Pig Rescue, a small, home-based animal-welfare organization in Ontario.

Help Petfinder Adopt the Internet Day is March 15 -- but the impact has already been huge.

More than 60 blogs and other websites have pledged to spread the word about pet adoption on March 15, and many have already started.

Here are some of the great ways adoptable pets are taking over the web on March 15:

• Adoptable-pet photo galleries: Oprah.com (yes, that's the Oprah) and PeoplePets.com will treat their millions of visitors to galleries of Petfinder pets.


• LOL adoptable pets: We hope you've been captioning Petfinder photos at ICanHasCheezburger.com! On March 15, the site will be spotlighting the photos with the funniest captions.


• Homepage takeovers: Our friends at Dogster and Catster will be dedicating their entire homepages to pet adoption!


• Today's top story: Pet-news sites PetSugar and AOL's PawNation will be blogging about pet adoption throughout the day.


• Prizes for pledgers: BISSELL is giving away 10 Pet Hair Eraser Vacuums to people who take our pledge to tell at least one person about pet adoption on March 15.


• Adoptable pets on Facebook: You can already search Petfinder pets on IAMS's Facebook page. IAMS has also been posting pet-adoption Happy Tails on Facebook, and will change its profile photo to an Adopt the Internet Day graphic on March 15.


• Wall of Fame: Each day next week, AnimalPlanet.com will post an adorable Petfinder pet on its Wall of Fame.

On March 15, adoptable pets are taking over the Web -- and I hope you'll help. In honor of our 15th birthday, we're asking everyone to Help Petfinder Adopt the Internet by getting online and spreading the word about pet adoption.

We've gotten many friends on board: ICanHasCheezBurger.com has adoptable-pet photos you can caption today, and on March 15 PeoplePets.com feature a Petfinder gallery of adoptable pets, Dogster and Catster are doing homepage takeovers, FIDOFriendly magazine is doing a 12-hour blogathon, and AOL's Paw Nation, the Humane Society of the United States, PetSugar, PetSide and many others have committed to blogging about pet adoption. (Check out our Adopt the Internet Day homepage for a list of our partners.)

But we need your help too. Here are some easy ways you can help spread the word about adoptable pets on March 15.