I find it interesting that it actually took them this long to get around to WordAds. Still it's never too late to get started. One thing you might want to note, is that most sites that did have access to AdSense still would have completely unrelated ads filling out their site without any filters to make it relevant. In the end, I worry more about how easily ad click numbers can be inflated by non-potential customers. Sure, the blogger doesn't care (they got the click payoff) but I imagine that some poor company out there is siphoning money off to Google & Co. for less than desired actual real buyers. I myself have never clicked on a Google ad, except by pure accident/trickery.

Back on topic, my own site is way too small to even consider advertising, so I can only promote myself... in the sidebar... yay!