Good article especially considering that there's a definite lack of concise, to the point articles out there on SQL Server migrations.

It may be good to note also that GoldenGate Software just graduated from SQL Server trigger-based replication to replicating right off the transaction logs. DataMirror has something as well. And Quest Software could very well be coming out with something too.

Another consideration from the "Understanding What is Involved" section may also be whether the OS environment is changing (i.e. going from 32-bit to 64-bit to get that extra RAM we're always starved for).