I am looking to do an upgrade from Windows server 2003 Standard to SBS 2008 Standard.

Has anyone done this and have any tips or anything I should be looking for when I do it?

I haven't had much contact with SBS (I work with Standard and Enterprise most of the time) and I have heard things about having them both on the same network. This would be an issue as the SBS box will become the new DC.

So if anyone has any advice it will be greatly appreciated.