Is Google AdSense Worth It?

For the better part of a year now, I've polluted this blog with Google AdSense (the banner ads that you see at the top and sometimes at the side of this blog (when viewed in the browser, of course, since I don't use AdSense in the RSS feeds)).

I checked my "statement" today, and have earned a whopping $5.50 so far. Only $94.50 to go before they'll cut me a check!

Does anyone at all have success hosting Google AdSense on their blogs (without clicking on the ads themselves)? Or is it just a waste of screen real estate, since surfers are now used to just ignoring banners? The only one who seems to be making out here is Google themselves, since I have a lot of page impressions (which I think they get paid for), but very few click-throughs (which I then get a piece of).