I have a BB 8800 running operating system 4.2.1.90 and am having problems getting Windows Live Messenger to work. It comes up stating that the service is not enabled for this handheld, yet I downloaded the version for a Blackberry.
I tried it and I got it running but there was no option for a hotmail.co.uk address, just msn.com, live.com or hotmail.com then when I selected 'other' it just crashed.