Here's a great blog post about it, http://toddmcdermid.blogspot.com/2009/10/quick-reference-ssis-in-32-and-64-bits.html
Jack Corbett
Consultant - Straight Path Solutions
Check out these links on how to get faster and more accurate answers:
Forum Etiquette: How to post data/code on a forum to get the best help
Need an Answer? Actually, No ... You Need a Question