For those of you interested in what's new in SSIS in service pack 2, here are a couple of resources:
New Features: http://download.microsoft.com/download/2/B/5/2B5E5D37-9B17-423D-BC8F-B11ECD4195B4/WhatsNewSQL2005SP2.htm#BKMK_IntegrationServices
Bug fixes: http://support.microsoft.com/default.aspx/kb/921896
Note that in SP1 there were alot of new features and bug fixes that weren't publicised so I wouldn't expect that the links above will give you an exhaustive list. I'm currently downloading the latest CTP of SP2 (not before time) so if I find out anything interesting I'll let you know.
-Jamie