Here's what I did...
Download
http://www.vijay555.com/?Releases:VJEschaton
Map the IE button on the 6700 to the "screen off" shortcut that package provides
Now, in a call, as I bring the phone to my ear, I press the IE button with my thumb.
Screen off, buttons all dead... joy!
Just press power button to bring it back (to hang up, for example)
I hold my phone in my left hand, so the IE button is pretty much right there under my thumb - and I don't use it for IE anyway
