Information I have read (and my dealer said he heard the same thing) was that current plans are to ship around 1,000 Street Triples to the US for the 2009 model year, with the larger percentage of those being the "R" variant. That's a very small amount of bikes considering how large in demand they are, but it's my understanding that there is quite a waiting list in Europe for buyers and with the British pound hammering the dollar Triumph can't make them fast enough so satisfy demand there, let alone here (in the USA).
I was really lucky - I just happened to contact my local (about 80 miles away) Triumph dealer about a week before he got one in. He emailed me promptly when it arrived and I scarfed it up.

He told me he probably would not be able to get another ST3 until later in the spring of 2009.
Neanderthal