elstar.com.au

I found this site gives a good overview of the process
Small Business Server 2008 Offers Easier Migration
The live migration capabilities in SBS 2008 allow installs and data transfers with less disruption to end users.
http://biztechmagazine.com/article.asp?item_id=525

Microsoft's Downloadable documentation for Windows Small Business Server 2008
http://technet.microsoft.com/en-us/library/cc707659.aspx

This is Microsoft's Windows® Small Business Server 2008 Migration Help
Provides step-by-step instructions for migrating from Windows SBS 2003 or 2008 to Windows SBS 2008.
http://go.microsoft.com/fwlink/?LinkId=122143