i HATE you all!!!
I think i've tried so many different things (including changing channel which worked for about 3 days - a record) that my MP is now a bit confused and fractured. There seem to be bits and pieces of the things i've tried lying around my mac.
I've tried setting up new keychains so there are some of those old ones lying around, there are several locations each with different passwords and fractured settings. And i've changed from WPA to WEP to WPA to WEP so many times its not funny. All in all i've tried about 10 different solutions all of which have had some sucess for about 24 hours but then the signal drops to 2 bars, and the transmit rate bottoms out at '1' (Alt-Click the black bars to see what i mean)
All in all a bit of a mess. Can i some how reset all the keychains/locations/settigns/everything to do with Airport in one fell swoop? Reinstalling the OS isn't an option really (i haven't got the time to reinstall all my apps etc)