I tested the AdBrite in-text links recently on my blog.. needless to say, they were annoying me. I also spoke to someone from Kontera about buying ad space on WF, and I think the rep was a little retarded. She kept telling me how I can make thousands and thousands of dollars if I added it to the forum, and I kept saying "no, that would just annoy me and everyone else, these are webmasters, they know not to click on those things, I'd much rather you buy ad space instead" and then she told me they don't do that... ::cough::BULLSHIT::cough::.. I tried Intellitxt on a fairly high volume traffic site for shoppers we have, and it converts OKAY. Nothing spectacular to be honest..
I think that with all of these types of ads, it's a good idea on paper, but a piece of shit idea in reality. Compared to Adsense/YPN or any other type of REAL contextual advertising it doesn't even compare, not in the slightest bit. If you just had to register 1 click instead of 2, then I can understand it, and that hovering box is pretty irritating.. but.. this is coming from a webmaster, not a stupid visitor who doesn't know any better, because let's face it.. there are still MILLIONS of people out there that don't know AdWords are actually ads and not "suggested results"...