How many planets at Alpha Centauri?

Perhaps the question is not so much 'how many planets there might be'
but 'how soon we could look for them in a proper way'.

The Terrestrial Planet Finder mission is not due for launch before 2014
at the earliest, and I suspect there is not much room for prioritising
it in any way, because of the complex technology that will be involved.

But I remain optimistic we'll find those planets soon enough!

Abdul Ahad