US Cellular made 4.5 available for I guess is what a short time now as it is no longer on the website. Instead of an upgrade, I wiped my BlackBerry and freshly installed 4.5.
I noticed just now that Yahoo! shows up as a calender on my BlackBerry without my having synced it. I once did have Desktop Manager sync my calender with Yahoo!, but stopped it and deleted the service book. Now it's back.
At first I wondered if wireless syncing had been rolled out without me knowing, but that doesn't seem to be the case. All I can figure is the service book is there and keeps getting sent to my device.