Free SSIS SQL Server 2005 Book
In celebration of Microsoft Press 25th Anniversary, they are going to offer a monthly free e-book. Till January 28th 2009, they are offering SQL Server 2005 Integration Services Step by Step by Paul Turley, Joe Kasprzak, Scott Cameron, Satoshi Iizuka, and Pablo Guzman for free. Yes, not just a chapter or two, but the entire book! I think you can find the book useful even if you're using SSIS in SQL Server 2008. Though I know they are some changes made to SSIS from SQL Server 2005 to SQL Server 2008, I think that quite a big part of it all stayed the same, so for the very least you'll be able to use part of the book.
So before you miss out on the chance, go and download your free copy of SQL Server 2005 Integration Services Step by Step.