Is it possible to paste a number into the dialer? (or get another dialer that has this feature). I have Android 2.2 (HTC Desire HD)
A solution is to use Number Saver which automatically suggests to call a number if the clipboard contains it.
My solution to your other question at Save a number during a phone call could also be a shortcut to this problem: Paste the number in a note application that supports phone hyperlinks and click on it.