With one dedicated developer, since early 2008 until late 2009, we develop, deploy, and maintain for a US client a social networking application for party goers.

Interesting experience include:

• Integrating the beast plugin with to the Rails app. For example, login to the Rails app means logging in to the forum as well.
• Using shoulda as the test suite
• Using SWFUpload. Although it's better to write our own Flex for upload with progress bar.
• Instead of writing h() all the time for potential malicious content, we use a useful plugin called cross_site_sniper