So yeah Google Cal Sync doesn’t work with Outlook 2010 Preview, but I found a way to get it to jive.
I edited Outlook.exe in C:\Program Files\Microsoft Office\Office14 using Notepad++ with the Hex-Editor plugin. At assembly location 0x000c09b2, I changed the value to 0x32, in the ascii dump. It originally read (14.0.0 and now reads (12.0.0
Good luck, I have no idea what this might break, I hope it is just the outlook version that the add in manager reports to add ins :). I have successfully synced events to and from my GCal!