Sweet! I just configured jpcache to cache and gzip compiled pages on hatch.org. So the b2 powered blog should feel snappier. I need to work out a few of the kinks with respect to expiring the cache when there are new posts and/or comments. Plus, I had to trap the gzip compression function in b2, because jpcache does it as well, but for the most part it seems to be working well.
This works with Movable Type too!