I have been pondering why Microsoft have a manual migration process for Companyweb from SBS 2003 to SBS 2008. My conclusion is that in SBS 2008 there are at least two special items - Fax Center and Archived E-Mails, that would be lost if you did a straight old to new migration. So, the safest option is simply migrate to a backup site (oldcomapnyweb) on SBS 2008 and let the user copy data from there.
That is all well and good but what I can't understand is why Microsoft simply doesn't save these "special locations" as templates and then have the user add them in manually later if required. I have been testing that exact concept and it seems to work pretty well so far.
From what I see it is going to be far easier to migrate Companyweb directly from SBS 2003 to SBS 2008 and then add in the "special locations".