One thing I noticed is now that I have the online address book, whenever I have a new computer that gets added, it automatically prepends the computer name with the address book name. Makes it look really messy until I have to go back and rename the new host and remove the name of the address book..
I will be primarily be using this for my clients out on the WAN, no need for AD at this time. However, I wish the server software had everything in one place instead of having basically 2 pieces of software. Configuration and then administration in that makes any sense.