Thanks for posting this! I think you may have provided the solution to one of my wishes. I often wish that I had another
bucky bit that I could hold down when using the clipping shortcut so I could control whether my clipping goes straight to the Inbox, or stops in the Quick Entry box. No matter which way I set the option, inevitably the next bunch of clippings turn out to be ones where the other choice would have been better! It looks like perhaps the solution for me would be to have the clipping service go to the Quick Entry box, and cobble up a similar script to yours that puts the clipping straight in, fired off from a suitable keyboard shortcut via Fast Scripts.
Another thread to be clipped to my "Useful Applescript posts from the Omni forums" project :)