We have seen a number of different updates being released for SQL and the Windows Internal Database.
To date we have not installed any of these updates as we are always a bit apprehensive when it comes to installing updates into SQL or SharePoint Services.
We will begin testing the updates on our lab systems shortly to make sure that nothing blows up.
In the mean time, make sure that a good and tested backup is in place, and that an incremental backup has been run prior to installing _any_ SBS product component updates.
Microsoft Small Business Specialists
Co-Author: SBS 2008 Blueprint Book