There have always been ads on Talksox to help me pay for the site. There was a google ad on the top of the page on the old pre-hacked version and I finally got around to replacing it (its in a slightly different location) yesterday.
They're placed there by me but the content is served by Google so they are tailored to each person. There's a big banner at the top for guests and I hope that the new small text ad at the top for everyone isn't too intrusive.