The Dell 802.11g Truemobile parts are all Broadcom based I believe. Their 802.11b Truemobile parts however were all Orinoco/Agere/CoffeeStain based.
Yeah, I one spent four hours trying to get an Truemobile Orinoco based card work for someone. It wouldn't connect to the linksys AP for long enough to get any data through. Switched in a Belkin and everything worked great. The dell boards didn't have any solutions, and a new card is far cheapter than paying me to wait on hold for dell tech support.
Now i've got a Truemobile 1400 a/b/g card which is Dell's top of the line Broadcom based card. If I connect to my netgear 802.11a AP, it'll stop working for about 30 secconds every ten minutes. I'm not sure if it's the card or the AP, but It's damed annoying.
Of course, a broadcom based AP would probably be a good thing to go with my broadcom based minipci card, but I'm really opposed to that kind of non-interoperability.
Matthew