This is something I started this morning, and it does show the speed of development for WP7.
Itâ€™s a relatively simple application that displays XKCD feeds, and has support for the text popups along with caching using IsolatedStorage (so you only download each image once). In the video, I broke the â€œFirstâ€ button when I was adding in support for IsolatedStorage. It does now jump to the first image!
For devs out there, I will be publishing the source code shortly (it needs a clearup!).
So, what do you think?