Thanks for that info, I picked up my few, the guy at CC said no problem getting a rebate on several, we will see! (it says one per household)
It looks like you need to re-compile the Kernel in Linux to get it to work with a 2.2, using a "backport" patch. It is one of the supported devices, since it uses the "ADMtek Pegasus AN986" chip (DSB-650 model). This is the same chip used in the Linksys USB100TX.
If you are brave enough to open it, you have to pry gently straight up in the center of the plastic case and it will "pop". You will slightly damage the case, no way around that.
There is a "Broadcom BCM5201" chip that looks like it controls the tx/rx lines, a regular "Delta" black box transformer "LF8271", same as on any network card, a 48 Mhz and 25 Mhz crystal, 3V regulator that looks like it converts the USB 5V to 3V for all the other chips on board. On the bottom there's a Atmel 93C46 (NVROM 8 pin chip, holds the Node ID or Mac address I assume) a "ISSI" IS61LV256-15T (256K NVROM I think, for the main chip's program). A USB "B" port connector and a RJ-45 Ethernet connector. It comes with a USB "B" to "A" cable.
The board is about 2" X 3". The case is nice and there are two LED's one green the other amber.
The point of all this is that for $5 you are getting a good pile of parts! Some smart hacker out there could probably re-program the 256 NVROM with his own code and make some sort of nifty USB or network device. You could steal power from the network port, if they don't already have that on board. It would be fun to talk to the little NVROM and change the Mac address just for fun.
You have till 8/17 to go get yours, then the rebate ends.
Links to the Linux USB stuff