I've done some testing and 8.09 and trunk both support the Asus WL-330gE out of the box. It's YABD (Yet Another Broadcom Device), but a small one at that and so far as I can tell it's based on the WL-520gU sources. I'll have patches submitted for kmod-diag/netconfig and a wiki write-up soonish, so it can be "officially" supported. For now, look to this thread for any more info. I give you permission, flash away!
* One ethernet port
* 240mhz, 4mb flash, 16mb RAM -- the same integrated chip as the Asus WL-520gU
* I have device detection, the reset button and the power LED working (releasing soon)
* The CFE failsafe boot mode works -- hold the reset button, the power LED flashes, tftp an image
* It's pretty cheap, I paid retail $40 CAD for it (after a mail-in rebate)
Here's how it looks next my keys for size comparison. It comes with the nifty little case, a USB power cord, a tiny Ethernet cable, and a regular power adapter (not shown).
Any questions? Ask away...