I tried adbrite once, since many recommended it, but immediately after entering the ad code, I got the "Advertise on this site" banner in my leaderboard. It made my site look gay and cheesy, so I quickly removed it. I'm wondering, how long do I have to tolerate that before ads start appearing? And can you make money from adbrite's inline word links on their own?
It usually takes a couple of days for your ad zone to be approved and after that network ads should appear. And yes, you can make some good money just from inlines alone. I use inlines by themself on about a dozen of my sites and I'm getting about 10 cents per click consistently. Check this AdBrite review for more info.