@Ross - speaking of improving the recoverable items (dumpster) - any chance you all are planning on reintroducing the ability for users to recover items deleted from a specific folder and or the folder heirarchy?
In Exchange 2007 you could restore everything deleted in just a specific folder such the Inbox or the Calendar individually. While this was tedious if you wanted to recovery everything deleted in a mailbox across multiple folders, you could restore a folder hierarchy and put things back the way they were in a very controlled manner.
In Exchange 2010 deleted items all seem to go into a single folder/bucket, and when you restore items they get restored to the folder you are currently focus on, not where they came from nor the hierarchy they were in.
While this might not sound like that big of an issue, it makes troubleshooting things like a POP client downloading everything from the Inbox a lot harder after the fact. Also if a user deletes a number of folders with a specific hierarchy and items in them, and they want their mailbox put back the way it was, we have to resort to a backup file to restore their mailbox since the recover deleted items doesn't seem to maintain this level of detail like the previous version of Exchange did. I.E. the lack of folder heirarchy retention makes certain troubleshooting harder, and makes more work for us in that some recoveries require a mailbox restore versus a few minutes of combing the mailbox and recovery items from where they were deleted.
Sorry if this is a little off topic.