I added a link to the Philadelphia Master Gardener's Blog to the Other Blog Links page. They also pointed out that there is a Blog List for Pennsylvania Master Gardener's here. I've requested that our blog be added to it. You can also find us from the College of Ag Sciences Blog list here.
Update: 5/16/12 - We're now on the list. Also, if you go to the Master Gardener page of the Penn State Extension Web Site for Franklin County, there are Facebook and Blog links to our respective Facebook Page, and back to here. The links are located on the right side of the page just under "Connect With Us".