“Actually, if you have Sony Soundforge, when you are in Vegas, right-click on your audio timeline, or a portion of it that you’ve sliced for editing, and click ‘Open a copy in Soundforge’. Soundforge will open your clip and you can edit the audio from there, save (it will save a copy of the changed audio file back in your Vegas project) and Vegas will reflect your changed audio back in your timeline.”
You can do exactly the same with Soundbooth (Go to OPTIONS-PREFERENCES-AUDIO tab and set Soundbooth as your favorite audio editor).
Soundbooth has the advance that you can select pieces of disturbing noise in the spectral view and repair this without disturbing the rest of the spectral view. I don’t know about the latest version of Soundforge, but in version 8 this was not possible.

Theo