Yes, of course, as many others have pointed out as well. Ditto for taking a quick camera shot, etc.
But for me the issue is all the manual work. Assigning a filename and location when scanning, selecting attach in the email program, finding the folder and file, etc. It's quite a few steps, and enough of a pain that I don't often do it.
The automated aspects Spef describe with his scanner sound like a big improvement. I'd like a scanner that takes the paper through a slot (spitting it out after scanning). It should be settable to default to automatically attaching a small .gif file, etc., right in my open email composition. Maybe it should first popup the scan for my one-click approval, or for simple editing, cropping, etc.
If the email was html, and I could insert and annotate the sketch and continue the exposition, adding another sketch, etc., that'd be even better!
Come on dudes, this is 2005, let's get down!