What application do you want to see?

I'm moving to Boston in four weeks and I will need to find a full time job unless I start generating consistent revenue. Maybe there's an application someone here wants to see that I can build in a week or two. The goal is to not be forced into a full time position.

I'm a PHP guy but I'm willing to learn any language to get the job done. In the middle of learning Ruby on Rails.

So, what do you want to see?