You are looking for some projects to build? How about a digital timetracker, like in the offices that everyone needs to pass their card to let know when they come in and when they come out, with users and projects to work on, description on what they were wokring on, reports on projects and workers, and every-one who is registered can log in and work from home... you can use wither mdb or XML to save data.... I've done something very small like this...