Thanks to both of you for your replies... that was NOT what I wanted to hear!
Will I be OK with the Dell 1510 wi-fi card then, do you know, or is their possible a better (Apple?) alternative perhaps? Edit
: I have just found an Apple Airport Extreme 802.11G Compatible Mini Card - Model number: AR5BXB6 (Atheros card) on eBay.
This should work OK, shouldn't it? Edit 2
: Damn... on looking closely, I don't think that this is a 'half-height' card, so won't therefore fit into my Mini 10v... surely there must be one card (even if it is only a b/g spec.) which will work OK? How about the standard Dell 1397, or it's Broadcom equivalent?