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Are banner ads still useful?

Rick Rouse argues that they are, but offers some strange logic to support his claim: a banner that looks like a normal text link. I'll take the text link (and the anchor text) over a banner ad that looks like a text link. I suppose the only useful advice is to create a custom banner for every web page you advertise on. The banner should blend in with each page. Mastering the obvious, we're also told that the web page should be related to the ad...