One of the bigger announcements at Mobile World Congress 2009 was Microsoft announcing their Windows Mobile 6.5 OS along with two new services MyPhone and Marketplace.

Microsoft made a presentation of Windows Mobile 6.5 on the HTC Touch Diamond2 handset and we have a video of that presentation for your viewing pleasure below which gives you a good overview of Windows Mobile 6.5.

Overall Windows Mobile 6.5 is a fairly significant upgrade and looks to be real nice, but is it really enough to turn round Windows Mobile’s fortunes? I guess we’ll have to wait and see.