The July CTP for SQL Server 2008 is no available here. To see what's new in the CTP go here. Download it, start using it and submit your feedback here.
I dispute the fact that that link actually tells you what is new in this CTP :)
It says "T-SQL improvements". What exactly?
it doesn't tell me what's new in SSIS (perhaps there isn't anything???)
You could always click on the T-SQL Improvements image and it will show you the detail.