If i remember correctly there is a vendor on here that sells really nice pieces of driftwood... unfortunately though, i can't think of the vendors name right now, but i'm sure someone else will be able to give that to you...
Too bad you don't live closer to Philly cause I'd recommend The Hideen Reef. They have some nice large pieces of drift wood for large tanks. But check it out if you're ever around there or feel like taking a road trip.