Under the Projects & Interest section--as it appears in the pdf view of my SO Careers Profile--is the url for my SO user page, and below that:
Written 328 answers. Active in python, r, numpy, machine learning and 4 other tags.
I have learned that employers are becoming more knowledgeable about SO every day, so would listing our rep alongside "Written 328 answers" be useful?
Second (and this is so closely related that i thought a single post is best) the template you've chose for the pdf view is really nice (my prior CVs look like handwritten Post-it notes, by comparison) and i think a naked url is out of place. Is making that url an active link in the pdf document (i.e., just showing the anchor text) something worth consideration.
So for instance,
how it looks now:
Projects And Interests: Stack Overflow--http://stackoverflow.com/users/66549/doug
Projects And Interests: My StackOverflow Profile