Hey Jersey,
Not sure if you were looking for seat tube diameter or seatpost diameter, but I'll chime in.
I just built up my '03 Salsa Bandito which comes with the standard 1 1/8" headset and takes a 31.6 seatpost. Came in at 19-something pounds according to the LBS, which isn't bad for a 20" I would think. My buddy swears it's lighter, but I'll probably swing by the shop in a couple weeks and throw it on their digital scale. I've also been slacking on posting pics, but I'll get around to that soon too!
Hope this helps some!

Not sure if you were looking for seat tube diameter or seatpost diameter, but I'll chime in.
I just built up my '03 Salsa Bandito which comes with the standard 1 1/8" headset and takes a 31.6 seatpost. Came in at 19-something pounds according to the LBS, which isn't bad for a 20" I would think. My buddy swears it's lighter, but I'll probably swing by the shop in a couple weeks and throw it on their digital scale. I've also been slacking on posting pics, but I'll get around to that soon too!
Hope this helps some!