Tim,

The little bit that I know is that the DTS migration tool will work for simple DTS packages, but some of the more complex ones will not convert because there is no exact match for some of the DTS functions in SSIS.  Microsoft has a SQL2005 "add-in" you can download that allows 2000 DTS packages to be run & edited in SQL 2005. That's the route we will take initially, then re-write the 2000 DTS packages as 2005 as time & need dictates.