The hiring strategy for a "stealth" startup is to already have a good team (and maybe to hire from their friends). Why should any good candidate take an interest in working for you, based on a website blurb, if you're not willing to share basic information on what you're doing?
There are quite a few companies in "stealth mode" on Startuply. Generally, I think, providing a company name and some details about your team and office won't threaten your venture too much.
