I dunno what it is at the moment. Everything I try fails. The Airport Express seems to be no exception to this rule. Though interestingly the update applied to the MacBook (802.11n) seems to have a strange effect on my old (now re-instated) Wifi, it seems to kill the wireless on my router.
Having setup wireless on the MacMini it simultaneously kills both Airports.
Anyway, back to the Express. Things seemed fine, until the constant drops in the network. Then for some reason I was unable to access the express via the Airport Utility. So pissed off with the lastest in the line of failing electronics it’s gone back in the box. Ready to return to Solihull. This is where I’ll find out what the store are like at returns.
/edit: Not too sure if iStumbler is the issue with killing my router. However the Airport Express was dropping out before I used iStumbler (which was to see if the network was still present).