Charles Evans is completely right.
CLR, GAC etc.
I was at the 2008 Launch event and was listening to Bob F. presentation on Office 2007 in Sharepoint 2007 on Windows Server 2008 development. Guess what: you may use CLR functions in Office 2007. BUT.... As you know Microsoft claims that the Sharepoint comtains everything including documents in the database. Right? No Way! After the presentation I stopped by and confirmed with the Microsoft guys that these Office CLR assemblies are stored in GAC.
So if you are a DBA working for the Shareporint support team and your Sharepoint admin or the superusers did some Office CLR development, then when moving Sharepoint databases you will need to figure out what assemblies you need to move as well