Twitter is the place which the largest number of the smartest most capable people in the world have chosen to discuss stuff in public. There might be larger numbers of people on Facebook or LinkedIn, but the nature of the Twitter follow and discovery model makes it the place where you can tune into condensed matter physicists, human rights lawyers, celebrity photographers, product managers of your favourite MMORPG, or anyone who matches your definition of important.
Because people relevant to what you care about hang out on Twitter – and are addressable conversationally, this is the place you can reach them. CEOs literally do look at their @ messages, and those who don’t today will do soon.
A nice post on Going Long on Twitter (surprisingly discovered on LinkedIn) by Azeem Azhar founder at PeerIndex.