I just checked and found "TU250bike.com" is an available domain name if anybody wants to startup a dedicated forum for the TUs. I'd follow.
Interesting info:
1) the GZ250 is no longer available in the US it seems. Lucky that bike has been around for a decade so there's plenty of NOS in the US.
2) Suzuki motorcycle shops tell me that its "hard" to get new Suzuki bikes now at the end of 2011.
3) I haven't seen new TU250X nor Boulevard S40 Suzuki bike in my local Suzuki motorcycle shops for a year though both are now legal in California. They say where California goes, the rest of the US follows, especially with imports from Japan
4) I've seen many reports that the TU250 uses the "same engine" as the GZ250. But if you compare the top end, there's only one exhaust port on the TU. Don't know if the rest of the TU is the same as the GZ. At least the TU head is different from the GZ head.
5) I prefer the look of the TU, but it doesn't come in black or the faster red this year
lenkf