Didn't see anyone solve this....
In /blog/User controls
make a copy of PostList.ascx
rename it PostCatList.ascx
Add this to the BindPosts() function (replace guid with your guid (you can get it from the data table in SQL (Categories) or from the xml file in the App Data folder)
Guid catname =
then on the page you want this to display...
and then where you want them to display