Interesting observation--I can't find any news about it being discontinued, but I can't find it either (neither as a standalone item in the store nor as a bundled purchase with a new computer). It is still listed on Amazon (through J&R). The UK store still has it, however, and I wouldn't be surprised if other international stores still did, too.
Check back again later--perhaps they're just updating the store (although WHY, since they're surely not changing the modem!) or experiencing some glitch. Otherwise, congrats: you've discovered an unannounced product discontinuation.