I just got some of Red Coral's Miyaki live rock a couple of weeks ago. They are a bit on the expensive side, but they're quite porous. If you want 'lively' live rock, his isn't too bad. I've found two zoos and a tiny featherduster worm on the 12 lbs I bought from him.
Here's a link to his rocks...
http://www.redcoralaquarium.com/Live...aki/Miyaki.htm
Ben