The November CTP (CTP5) has been released. Go get it and start looking into some major new features added to this release.
Officially, the only change for SSIS are to the lookup components. I’ll have to get my hands dirty to see if there are any other changes that they didn’t comment on. One thing to note, is that C# is the default language type for SSIS Script Tasks/Components in SQL Server 2008.
I’m looking forward to some non-SSIS changes, though, like T-SQL IntelliSense, Transparent Data Encryption, and FILESTREAM support.