Working for a client this week I ran into and old foe; Windows SBS. This means that you won't be easily moving over users using 'Migration Assistant' or 'Parallels Transporter'. You'll be doing everything manually and it'll take A LOT of time!
As you can imagine, we run into this all the time and every time it is a real pain in the *bum*. Thankfully there is a great free program to help migrate domain user profiles to local profiles that makes this whole process so much easier.
Great little tool that then allows you to run 'Migration Assistant' normally. Perfect!