If you aren't seeing ads, your ad-blocker is probably killing them. I'd actually suggest whitelisting AW if that's the case; the ads here are pretty minor (they're not giant Flash monstrosities that play music or steal the page), and they do help to pay the upkeep. Alternatively, toss money Mac's way with the PayPal button above.
I know how much various folks (forums, webcomics, etc.) rely on advertising to bring in money to pay for hosting costs, so I actually have the default ad behavior as 'allowed' until a site does something that really bothers me. Popover Flash advertising that blocks my ability to read an article until I dismiss it gets you added to my ad blocker settings, for instance. An ad that plays audio, like, "Congratulations! You just won an iPod Nano! Click on the ad to enter your details!" will also get you added to the blocklist immediately. But banners that aren't directly killing my ability to read the page? I'll leave 'em, as they are often a necessary evil in paying the bills.