Dana says it very well here… http://silverstr.ufies.org/blog/archives/001001.html
I agree with him, the UAC stuff was extremely obtrusive in the beta phases and *might* get annoying when initially setting up a new PC if you are loading a ton of stuff but honestly, it hasn’t really bothered me since Beta2. That beta was rough and I actually turned it off permanently. With the RCs it was much better. With the released product I have only had to turn it off once and that was to get my Borland compiler to install. Other than that it runs all of the time and I really am not all that bothered by it because it doesn’t pop up that much.