Don't bother putting Exchange 2007 SP2 on SBS2008 just yet...
http://blogs.technet.com/sbs/archive/2009/08/25/how-to-install-exchange-2007-service-pack-2-on-windows-small-business-server-2008.aspx
FAIL
Sheesh! This saddens me. I fear we have taken a huge backwards step here in SBS land. I detest when a service pack comes out that causes specific issues with SBS, its like the days of SBS 4.x all over again.
My advice… Wait…
and lets hope that the SBS team build something that makes this process easier.
Oh, and to you guys on the Exchange team… whatever you were thinking when you released this without a *proper* fix being available for SBS first, please don’t do that again. I may have to beat you with a large stick.