If your not onto this then you soon should be either posting your ads or making money with it, the idea is brilliant.
Never have I had a faster return as a Publisher, with in 60 seconds of posting the ads on my twitter account with 150 followers I made $.50.. I know its not much to talk about, but it added up to $9.00 the first day.
I just set up myself as an advertiser too as I think it has great potential, have a look and report back to this thread if you find this useful.
Twitter PPC ads 