I wanted to grab one of the Logitech Z-5450 for a review, but they said no. (from the "At Least I Tried" department)
Honestly, however, I think that there exists a real market for computer speakers that use virtual surround algorithms like Dolby Virtual Speaker and SRS TruSurround to simulate the 5-channel sound field. This would do away with the very need for rear speakers, while wireless surround systems are just a more expensive solution to the problem of wiring the rear speakers. Before you say virtual surround algorithms are bogus, Denon has used Dolby Virtual Speaker to great effect in a couple of their recent HTiB systems (Home Theater in a Box). My home theater currently doesn't have much space for rear speakers, so I've been using the Dolby Virtual Speaker processing on my Harman/Kardon receiver, and it's really surprising what's possible. I don't know why this type of DSP technology hasn't been more widely applied to computer speaker systems. Bose's solution, though involving DSP to some extent, is more complicated than it needs to be, I think, and certainly more expensive. In my opinion, the answer in this case isn't to go wireless, but to eliminate the rear speakers altogether, and simulate them using DSP.
I hope Altec Lansing took notice of my review of their PT6021 system, in which I commented on this subject. If they're paying attention, they could seriously get the jump on the competition with a product to fill this niche.