To make this transfer as smooth as possible I thought up this scenario:

Close up board
Backup
Move data to new host
Get new host working a okay (already have a trial import running)
Open up new board
At old board, change database settings to use the database from the new host. (I can connect to it, I tested that)
Start the DNS circus

That way, old board, new board, same posts/stuff. You would only get logged out maybe once or twice because of the sessions stuff.

Anyone ever tried this or knows some issues?

[Linked Image from siemons.org]