I came to the Incredible from a Blackberry, and to sync my Google Calendar/work Outlook Calendar/Blackberry Calendar required me to export my Outlook Calendar as a .CSV, delete my Google Calendar, import the .CSV to Google, delete the Blackberry Calendar, and then run Google Sync. On the Incredible, I could not find how to delete the cached calendar until this morning. Just go to Settings, Applications, Manage Applications, Calendar Storage, then click Clear data. Then back out to Settings, select Accounts & sync, then click Sync all. Befor someone suggusts that I can just use the HTC Sync to cut the steps down, I cannot connect the Incredible to my work PC, and even if I could, I cannot run any "unapproved" software, and work won't approve of HTC Sync since they dont see a "business purpose" to it.