We are already about as far from "stealth" as you can get, in that all of our products are Open Source (Apache Licensed and on GitHub), we blog a lot, and we have a public facing website that makes it pretty clear what we're doing and aiming at.
That said, it's a sort of "static transparency". Anybody who cares to know, can come to fogbeam.com or our github site, etc., and learn a lot about us. But this post makes me think about a more "dynamic tranparency" where we push ideas / thoughts / code / whatever, out and more actively solicit feedback and interaction around that.
Of course we already solicit feedback, talk about the roadmap, etc., in private when meeting with potential customers in Customer Development interviews... but we could probably get more people involved and generate more good ideas that way.