Darn... seems I'll be relegated to single player only until I get rehoused into a place where I can install proper broadband (not allowed in current place, hence the 3G dongle).

I made sure everything was switched off (anti-virus, firewall etc) and getting into game lobby is no problem, but can't join any games... I reckon I prolly got a ping count that's through the roof - looks like 3G "broadband" isn't actually broadband after all.