WiFi
I hope the bods at RIM have done something about their WiFi, as on my work-supplied Curve 8900 it's virtually useless. Whilst it will claim that it's grabbed an IP from my router after a minute or so any WiFi usage goes straight out of the window and more often than not the WiFi connectivity has to be stopped and started before it'll work. Though nowadays I just can't be bothered to use WiFi on it at all. I've upgraded the OS to 5, no joy, and all the other WiFi devices in the house work fine. Bit of a pity as that aside it's not bad.