Hello ... just spent the last four hours trying to come up with a way to display a popup modal with a "first time visitor" greeting.
So the script would check if there is a cookie ... if there is, you just get the normal site ... if not, you get the "first time visitor" popup.
The ColorPop (http://coverpopjs.com/) thing was looking very promising but I could never get the Close Modal button to work.
You can see my efforts here: http://www.savagepixels.com/wti/first-time-visitor-popup-2.html
So, basically I'm clueless on this one and would appreciate any links, or guidance in this area. It doesn't sound all that hard and maybe that's why there isn't a ton of stuff out there. but I'm having difficulty coming up with a solution.