I think, a lot of people like to help with ubuntu development, but they don't know where to start. This includes not only programmers but also designers, music composers or just the normal ubuntu user.
So how about creating a website "howcanihelp.ubuntu.com" where everyone (except for C/C++ programmers ;-) ) can find out how to contribute?
Examples:
PHP Programmer -> help with Brainstorm Development, someproject.ubuntu.com needs a new Website, ...
Music Composer -> (don't know where this should link)
Graphic Artist ->
https://wiki.ubuntu.com/Artwork
Foreign Language Native Speaker -> Translate Subtitles at screencasts.ubuntu.com,...
Beginner Ubuntu User -> (don't know if we find something for them :-) )
Advanced Ubuntu User -> Help people at IRC #ubuntu,
https://help.ubuntu.com/community/WikiToDo, join the Documentation Team...
Marketing Expert -> ...
and so on!