I use my Aria to sync with my Exchange Calendar.  No problems there.  However, the Calendar app doesn't appear to allow for certain appointment parameters that Exchange supports.  The two that I notice and would love to have are:

"Show As [Busy/Free/Tentative/Out of Office]"

Private vs. Public (and maybe Confidential)

Others that might be handy are High/Low Importance and Categories (colors)

I've searched online and the manual and there doesn't seem to be any mention of this.  These are rather important to me - has any one else had luck with finding these options?  If not, any suggestions on alternative apps that can do this?