Yes, I have put a google ad column on the blog - but don't run away! It has a purpose other than advertising.
Basically, if you've ever used blogger as your blog you might notice that the statistics you can get on page views, etc... is, well, absent. I could use google analytics but that looked a bit bizarre to me, I'm not really bothered where everyone comes from or what my "bounce" rate is.
Therefore it serves a dual purpose. Possible giving me a little towards buying some of the games I review (not everyone gives me a free copy yet!) and letting me know how many times they show up (therefore: how many views of the blog there have been!)
They're pretty unobtrusive so hopefully they won't bother anyone too much.