In case you haven't seen this elsewhere, if you want Microsoft to release SP3 for SQL Server 2005. It's time to start rattling the cages, as they don't feel there has been enough customer demand to warrant a service pack release. Huh? That's the message from SQL Server MVP Hugo Kornelis.
Some sources on this:
The place to cast your vote is the entry on the Microsoft Connect site. At the time I write this there have only been 41 "confirmations" which I would suspect is far too few to get Microsoft to budge.