Well I've never used Heroku or IndexTank (or Rails for that matter), but I've had a small weekend hack I've been wanting to do for a while now involving a spattering of search. I was going to try out Solr but I think I'll learn Rails instead. I guess their marketing worked on me.

Btw, we need more hacking trophies, something made out of circuit boards, transistors, and wire, something that will put those little league "I played a sport!" trophies to shame. I suppose a Macbook will be an acceptable substitute.