I'd be wary of doing this. Anything that makes the HR person's job harder is likely to result in them totally ignoring your resume. At the very least, ensure that it's not required for them to find out about you.
Agreed. I get plenty(*) of moany emails from headhunters asking me for copies of mine in Word format, despite the fact that Word is perfectly capable of importing it from the website.
Put a URL in it anyway, though, if only so you can keep an eye on the server logs...
Peter
(*) Actually not so many these days.