I'm attending TechEd Orlando this year and I must say that I'm pretty impressed with the amount of sessions on the agenda (I usually attend TechEd / IT Forum in Europe, which is a day shorter) and the focus on Unified Communications in Office Communications Server 2007 and Exchange 2007.
Personally I attend sessions on subjects that are not my main area of expertise (No funny comments here !!), but I'm also looking forward to the sessions on programming against the AJAX/OCS SDK and Speech Server - as these haven't been my main focus until now.
Maybe I'll see you there ;-)