I have a BT home hub (Its the Home Hub 2 I belive, the black one with a SIP phone) and when ever I use my MacBook Pro on the wireless it crashes the router and it needs a hard reset but then everything works ok until the next time!
Also, when transfering large amounts of data between my PC and my HTPC say 100GBs+ the router will crash as obviously these to are hard wired as I haven't got a year to wait for the wireless transfer!