I was on a mission to find a blacked out version of Twitter due to a request, and I stumbled upon this this instead. I will still find that illusive blacked out version, but I wanted to share this transparent version first. XDA member adude247 has themed out the standard twitter application for your enjoyment. Giving it a transparent look with black text. He has also reversed the text to offer white for those of us that use deep dark wallpapers.
8/2/11 Updated Twitter with black text
8/2/11 Updated Twitter with white text
Source: XDA