I have been working on one in my spare time. It's pretty much done and I have ~10000 test XMR accrued for initial funding, but I think it will be another couple weeks before it's live. AFAIK, there aren't any at the moment, though some folks have publicized pre-loaded testnet wallets that others could use to get started.
Thinking about creating a testnet faucet
I couldn't find one before when I was looking and I'm sure people would use it. Is anyone else interested in this?
Right now I have a pretty basic webserver that will take an address and uses recaptcha. If you use git though, I'd like to help you depending on the language.
Cool. I've written mine in Python using Flask, not sure what language you're using. It's not on github at the moment, but likely will be soon. I have the wallet fully integrated and form submission/processing. reCaptcha is the last bit I need to add, but I've been swamped at work and by the time I get home my eyes are bleeding from staring at code all day, so I've been taking a short break from development of it, hah.