A key point that I made in my recent SQL Server 2005 Security presentation @ Tech Ed is that Execution Context is not the same as permissions checking via ownership chains....
http://www.tonybain.com/blog/posts/229.aspx
(this is posted on my other blog)
The release date for SQL Server 2005 is currently sometime around the middle of next year. This gives us enough time for everyone to gradually learn lot’s about what is new in the next version before it hits the shelves (and our servers).
To help facilitate this I have decided to post an overview of a New SQL Server 2005 Feature every day until the release date. So that’s about 300 new features, but don’t worry, there is plenty to cover. If you know people who want to learn Yukon in digestable chunks, flick them a link to my blog as I think this is going to be a lot of fun!