Not really sure if it's indexing my mail. It checks my mail every 5 minutes.
I think I've figured out the issue. In Entourage, I turned off the syncing between iCal, Address Book, and Notes. Once I did this, MS Sync Services rarely came up at all. Consequently, my CPU load, heat and battery issue was fixed. The problem is that unless I sync with iCal and Address Book, I have no way to get my iPhone to sync with Entourage.
This never happened before the latest Mac OS and iTunes update (I'm assuming something to do with MobileMe). Also at this time, something happened with my iTunes to iPhone sync. It now takes about 20-30 minutes for my iPhone to sync whereas it only took a few minutes before.
Not a happy camper....