Just scored a cheap WP7 device. Recommendations?

I just managed to score an Optimus 7 off contract for a ridiculously good price as part of a random 60 second deal from a site. I'm planning on playing with the development side of things, as well as just keeping it around to see how WP7 is going as a whole.

Can anyone recommend anything particularly neat apps-or-otherwise? Anything like Reeder on WP7?