Yes, there are ads on the site now. I chose Google's text ads because they are easy to work with and unoffensive, as ads go. You'll find no crying about "covering my expenses" or other weepy hand-wringing... I just wanted to try making a few bucks since for some reason thousands of visitors come here each month.
If you want to block the ads, it's easy and you are more than welcome to--not that I could stop you anyway. Check out this help file for all the info.