How about these as UI designs? Click for a bigger image. I'm no UI design guru (and I was advised not to do art for GSCE…), so please complain loudly if you don't agree or have better suggestions. When we've got a simple GUI fleshed out we can work towards user interactions and how to use an API. Thanks.
Design Ideas

Looks great! One point though, if you are using a “cell-selection” method, people won't understand that you could select multiple applications. And hey, if you need a more graphically mockup of this concept, give me a ping!