I just headed over to the Twitter API site - only to find a large header image saying "Hacked By HeuRisTic wWw.ReaLinFaz.Com".

The image seems to be from the URL "http://apiwiki.twitter.com/f/twitterapi_logo.png", which is quite scary. It seems to be hosted by pbwiki.com, so not really the Twitter servers and not anything to do with Twitter.

The image itself: