I recently picked up this kit from B&H and am very happy with it. On thing I didn't realize was that they can trigger off of a Speedlite 430EX. That was a happy surprise! I originally used the included cable to connect one head to my 40D, and had the second head set up to trigger off the first. One time I forgot to plug in the 40D and... wow, it still worked.
I agree that they are plenty bright enough in a small room (about 15x20 feet) and I have no problems shooting at 1/200 or 1/250. The beep that tells you they are ready to fire again is very helpful.
My only complaint is that the stands are a bit flimsy. If I have them extended all the way to the maximum eight, they kind of sag to the side and look like they are about to fall over. I don't have sand bags to weight them down, but have been using gaffers tape. That seems to be working, but it still makes me a little nervous.
Oh, and that softbox was murder to assemble. Maybe it's just mine, but it was a very, very tight fit to get it together. The black material on the sides of the box is literally coming apart at the seams under the strain of it all. It didn't rip, but it's looks close. I would never take it apart and try to re-assemble it. Maybe just bad quality control and I got the bad one? That's a small problem, though, and it works fine now that it is assembled.
Overall, I really like it and would recommend it to anyone looking for a cheap starter set. (under $300 US when i bought it)