The Chronicle has created a new self-serve advertising site for small to medium sized businesses, www.instaad.net.
It's awesome! I placed three ads in their main news section on a Sunday for $275 each - and my phone at the salon rang like crazy. I never would have been able to afford it. Plus there are templates already there that you can use, or yopu can create your own ad and upload iot. pretty cool. check it out.