I recently published my first website and I am getting word back that people viewing my website are getting a ton of those highlighted text ads that direct you to other websites. I've looked on 3 different computers and can't see any of them though.

Any idea what could be causing this?

The people who are seeing ads probably have some nasty toolbar or other "free" utility installed, where "free" is paid for by the ads they are seeing!

Could you share a link to your site so we can take a look?

Someone else here had that going on... I think it turned out to be a browser add-on that automatically installed itself with an update or download of some sort.
If so, it will be up to the user to either leave it or remove it, you have no control over others' dodgy downloads

My wife is a pro at getting these.

Don't let her near your computer

I had this happening a couple of weeks ago, here:
http://www.coffeecup.com/forums/the-bre … post213310

I use Firefox, and I found the culprit among the Ffx add-ons or extensions.