>I think I understand Server-to-Server communications (But am Fuzzy) to know
>that I can define a loopback server but I am confused on how that can help
>me during the migration.

Bill - Check out the Redbook: ADSM Server-to-Server Implementation and 
Operation.

The archive-type glob of data that ends up on the other system serves as a means
of conveyance to get the data across in "neutral" form, so that you don't have
to be concerned about using equivalent tape drives.  Once in the new server,
you do a pseudo "server-to-server" within that box to import the data.
That's easy for me to say, having only read about it, but there you are.  :-)
    Richard Sims, BU