SSIS is a little more cumbersome than DTS was in SQL 2000. <BR><BR>If you are doing a one-time upload, and know the SQL to do it, it probably won't be worth your time to learn SSIS.<BR><BR>OTOH ...

Now in SSIS 2008 there is a Caching Mode that defaults to Full. This means that the lookup query is executed before the Lookup transformation itself and the results put into a cache in memory.