...well, the world of software dev.
Right now there's no implementation of 7zip for the managed world. There is a C# port of the LZMA algorithm for compressing streams but it isn't 7z compatible and has pitiful performance (6 min to compress 80MB when 7z does it in 30 seconds). The only alternatives include P/Invoking to the 7z DLLs or using ShellExecute.
7z is under a pretty liberal licensing scheme and is begging for a port over to C#. I can't do it all myself as it's a fairly large undertaking, I imagine a team of two or three people would be great, especially if you're a student like me who doesn't have much to do over the summer holiday until October.
I propose putting it on CodePlex and doing all dev there. Who'se with me?
This would also be my first true "team" software dev exercise; to anyone who might be interested: I can deflate my ego where necessary, I'm after a nice managed 7z library first, fame and glory second.