Both - I find them useful, and I think it's the "wrong" thing to do morally. I'd much rather it was in a separate sidebar, leaving the google page as it was intended.
WebMynd is definitely targeted at the people who don't find the ads on the right particularly useful.
We think it is right that users should be able to opt-in to have more control over how their online tools appear and function. Provided there is attribution i.e. we're not taking a tool or content and claiming we created it.
Sure, bear in mind though "people who don't find ads useful" is a very small niche market. Also by definition, they're not the type of people you can monetize.