You can still get live rock, though many (including myself) choose to use dry rock because there is no risk of unwanted hitchhikers. If you want live rock your best bet is to either get it locally from your LFS, or order it from Tampa Bay Saltwater. TBS has the best live rock you will find and comes with TONS of life. IT will have coralline, sponges, macro algae, and some corals. Some people have even reported finding starfish and even fish with their rock.
Of course this also means you can get some nasties, like gorilla crabs and pistol shrimp, so you have to be sure to clear the rock of any of these before adding it to your tank.