If applying for a new job, would you put your Stack Overflow profile link on your resume?

This would show the employer you're an active member of the development community and also provide an insight into your knowledge + how well you convey your ideas.

However it would feel a bit gimmicky to me?

It Depends

When I was looking for a job a month ago, I didn't put a link to SO on my resume, but I did mention that I participate on SO and added a link to my blog that contains the SO "flair" on the About page. At that point I had about 3000 rep.

I wouldn't try to leverage rep, but I would leverage intelligent participation. If you act like a moron on SO and draw attention to it, that's obviously a bad move. But if you say "hey, I participate on this dedicated Q&A site" and you have been giving good answers and asking smart questions, it can work in your favour as it shows passion for your work and fellow developers.
