Yeah, it was once in the ocean. On my last order, a lot of the pieces had shell imprints, coral skeletons, etc. It's definately the way to go if you want to save some money. When I upgraded from a 29 to my 75, I bought about 35 lbs of the rubble, although I asked him to throw in a couple of bigger sized pieces. I simply used this, and then added the 30 or so pounds of live from the 29, and it worked out great. I also threw a few pounds of the really small pieces into my sump, and pull it out to attach frags to.
For a new tank, you would still want to buy live rock, as KJ is going to do, to seed it. But in an established tank, it's great to just add and build up what you have, throw it in the sump, use it for frags, etc.
Looks like this is going to be a pretty good sized order. I may have to ask for the money up front, because I don't think I can afford to pay for it all myself. I think I will plan on ordering it next week, so if anyone else is interested, please post. Once I get a total order and a final price, I wll let everyone know their total.