Our community created a few development tests for Facebook, Twitter, Paypal and Windows Phone. What do you think? We'd really appreciate it if you could take a look and give some feedback.

Twitter Development Test

Facebook Development Test

Paypal Development Test

Windows Phone Development Test

The tests do ask for users to create a free account but info is kept completely private and we don't spam. Some people thought this was a data mining effort, but we just wanted to see if the developers here think the tests are up to snuff. Thanks!