The SanDisk Connect card is absolutely plug and play with any of the Sharp ROMs and the tkcROM. No issues other than the fact that I fried my first one
The replacement has worked just as easily. Can be found on buy.com or amazon for ~ $65-70
Note: NOT talking about the Connect that has built in 128MB of memory!
It\'s also a low power card and from my experience has as good/better range than my NetGear PCMCIA card. Also, it comes with a PCMCIA kit and is plug and play with Windows XP as a WiFi card.