I think I just hit the last straw with android. On a trip to the UK I swapped in my UK sim (no internet access on that one) I tried to acess the calendar and it wouldn't do it unless I signed in to google, so I was stuck without access to the calendar, what I had to do was put in the swisscom sim and enable data access while roaming just to view the calendar, heck knows how much swisscom will charge for that.

Back to windows mobile for me, it's slow and clunky but it does what I want it to do.