so, you're not giving your potential users any hint of what you're up to and on the other hand expect everybody tell their friends about it.
your twitter account seems to be 1h old and your website tells me that you will launch in 6 and a half years, which most people interpret as you say/plan/hope/... to launch at that time.
seriously, if your idea is good people will copy you. cope with it. once again, execution is what matters. and the good thing about this is, that execution can't be copied that easy.
if you ask me do the following: start a blog. write about what you do every day (product, idea, company,...). follow people of your field on twitter. tweet every day.
don't tell anyone you won't reveal more details because you'll be copied. (a little secret (sorry to be that direct): it makes you look either unprofessional or like a jerk. you don't want both i guess.
tell everybody about your awesome idea. you'll get valuable feedback from people you wouldn't expect it.
sorry, this got so long.
martin