A good trick I learned at a very reputable LFS here in San Diego is to throw an uncooked shrimp into the tank (grocery-store shrimp is fine) and let it rot. It will introduce the bacteria you need and coalesce with the decaying matter from your new live-rock. When it rots, it will jump-start the nitrogen cycle....good to go in 3-4 weeks.

Just a thought....easy, cheap alternative.