@Chris:

Wake up Microsoft, Google is invading the world while you are asleep.

I think Microsoft knows about this. From what I've read, it sounds like they've licensed ActiveSync to Google (and the Support Code 0×80004005 that Matt got, which looks suspiciously like the wonderful ActiveSync errors, seems to confirm that).

Steve

Set it up on my iPhone last night and I have to say I'm super happy with it. I already had all my contacts on gmail so this works great for me.

Being the Guinea pig that I always seem to be, I set this up on my Touch Diamond and the results were, well, disasterous.

Contacts:
All of my (700+) contacts have been changed to display Last, First, whereas I had them set to First, Last. Wonderful.
I also ended up with quite a few duplicates, AND (this is the most irritating part), since the Contacts fields are not exactly the same between Windows Mobile and Google, many of the contacts where I had numerous email addresses are all jacked up. I now have addresses like this address1@xxx.com :: address2@xyz.com :: address3@abc.com inside of ONE email field!

Calendar:
Calendar wouldn't sync right at all. It took hours, then errored out with Support Code 0x80004005 - "Synchronization cannot be completed successfully because of a mobile device software error. Contact your network administrator."

GooSync was working great for me. I am restoring from Spb Backup to the way my PIM information was yesterday, and going back to using GooSync until I can try MyPhone when Microsoft opens it up for trial...