One of my favorite traffic exchanges is Top Tier Traffic.

Not only can you display your web sites but you can climb the leader board depending upon how much surfing you do and how high you climb allows you to add people to a downline that you can email each week.

Here's a couple of hints on how to use it:

1) Open multiple tabs when you surf (I usually open 10) and this allows you to quickly build up credits. Some traffic exchanges won't let you build up credits with multiple tabs but TTT does. If you surf 200 sites in a day which you can easily do with multiple tabs they credit you with 5000 position points (used for the leaderboard). One day a week (usually Wednesday) they ask you to surf 300 web sites to get some additional credits.

2) You don't have to be #1 on the leaderboard to build up a nice downline to email. In fact, usually the first 36 people on the leaderboard receive the same number of people they can email. This additional number is added to other people you already have in your downline such as referrals.

I also wanted to mention this site because they have something called the "Site of the Day". Actually, they have 2 of them, and for a fee you can have your web site displayed as the 1st or 2nd web site that people see when they surf the traffic exchange.  Today they are running a special where you can reserve a spot for $10. That's 80% off the regular price. So it might be something you would want to look into if you're looking for good exposure to your web site or splash page.