After some thinking I've just filled in application for Gammu in Google Summer of Code 2009. I feel the project is recently getting some boost and it would be great if some students would help us with new ideas.
On the other side I'm afraid that chances to get accepted for such a small project is quite limited, but if you have some great ideas which could be implemented as a summer project, feel free to add them to our wiki, maybe they will attract somebody :-).
Ideas page: http://www.gammu.org/wiki/index.php?title=Gammu:GSoC2009