Here is the idea for today. I think, the era of social networks is coming to its peak, but there is still great potential. I believe we'll have something like profession networks soon.
The idea is to join professionals in some areas (IT, please) and customers (yes, like rentacoder.com but more social). Professionals will join prof. networks because they could get here skills improvement, develop and share their ideas with colleagues/friends and certainly earn respect and money.
Ok, I have more thoughts on this, and truly believe in success of this idea. I'll share them probably soon (if you will be still interested, of course :)).