MVP, MVP..... Go as simple as possible, and make small changes often. Add feedback functions to keep the buzz, and include your clients in the process, they then get the pride of ownership... Think Pre-Launch, MVP0.1 Launch MVP1.0, timely revisions on feedback, build tightest customer engagement ever. I run a platform company that has nightly Revs on Apps, weekly revs on workflows, all customer driven.

Media and buzz are good, clients are better!