I'm really excited about Zipcar. Here's a fun article with background (you may have to register for NYT reading - lame, I know, but free). Shel and I are looking into it, we may try it this summer and possibly go car-free in the future! I'm excited. We'd have to get Shel another bike - DARN! - for easy commuting, but as I'm sure you'd guess I've already been thinking of a few. We would have to have a more centrally located residence, but we're looking in that direction anyway.
As always, more dreaming. :)