It is already made in GTK+. I've tried to install it under easy debian but just messed up my environment (it is on Squeeze repository, while my easy debian uses Lenny).
For me it would be enough to be able to run it under easy debian or (better yet) to be able to use it in maemo using the stylus.
Thanks,
Luis
PS-> I can help, but I don't know enough of GTK or maemo programming to help much.