[cyxxon]

Sounds nice. Just yesterday I saw another version of not too intrusive popup - it came after about 20 seconds at the bottom right, not obscuring the content, but noticable (some animation, don't remember exactly), and in the popup the headline was "Hey, at least it's not centered" or something like that. I actually smiled at that, so it got a positive initial impression. I didn't sign up because I wasn't that interested in the content of the site, but still nicely done.