If anyone is using Office Outlook Connector, to sync their Hotmail/Windows Live Hotmail/Windows Live Private Domain email (I hope those descriptions are approximately correct - the terminology is confusing), you will need a new version (14) of the Office Outlook Connector, as 12.1 will not work with Outlook 2010.
Installed at work, in an Exchange setup and happy with it so far. Outlook looks a lot like 2007 so far, with maybe a few cosmetic tweaks. Haven't really had a chance to check it all out, as it was only on for half an hour before I had to leave!
I did have a problem with it to start off with, as I chose the upgrade option, from 2003 -> 2010 32bit. Every time I tried to start it, it came up saying that there was an error and had to close etc. Checked the report, and it was mapi32x.dll causing the problem. Renamed it, and it started up fine.