Great idea. I could see myself using this as a quick way to start new projects... especially with Drupal, as downloading & installing a bunch of modules can be a long process.

That said, I think the interface for adding modules could be more efficient if it functioned a little more like the iTunes search bar - just pull stuff in as I type.

Also, there's no reason to take me to a new page when I add a module - it's a waste of time. Try some sort of lighter-weight confirmation... maybe just add it to a sidebar panel that lists the modules I've added and give me a little flash so I can see it popped up there. Otherwise, I have to wait for this page to load that doesn't tell me anything new.

Keep at it!