I'm currently updating Burnt Offerings from the Rise of the Runelords adventure path to 4th Edition, and I'm blogging the conversions for others to use in what is hopefully an easy-to-understand format. I'm only updating as my party runs through the adventure, so everything is play-tested once. Everything up through the end of the Catacombs of Wrath is finished - all that's left is Thistletop.
The blog is located at
Tales from the Rusty Dragon.