The 372 as we know it cannot be built past the end of the year, but they will still be in the pipeline for well into 2010.
There is supposed to be a X-torq/strato 372, (and 365), coming online sometime during the year. This is really just supposed to be a short term deal of a couple years.
I don't think there will be more than one version, so I would suspect that the 75cc XPW will go away with the XPG which is already NLA.
I'm loading up on them because I think once the end draws near, lots of dealers will grab them also and run the inventory down pretty quick.