The Fat Pastor is the blog of one of our hosts, Pastor Robb
Textweek is a great source for articles, commentaries, blogs, art, and historical works. There are is a lectionary index and a scripture index, so even if you're not following the lectionary, this is a great first-stop for Biblical study.
WorkingPreacher.org is a project of Luther Seminary. It is a great source for commentary on the Lectionary.