The version numbering for Radio UserLand is leading David Weller, Scott Hanselman, and Sam Gentile to think it hasn't been updated in almost a year.
Radio UserLand is updated frequently through automatic middle-of-the-night downloads -- the Radio.root changes feed lists 15 updates in the last month alone.
People who quit using Radio say often that there's no support. Where are they looking? UserLand programmers Jake Savin and Lawrence Lee participate frequently in the support and development discussion forums.
It is my opinion that Radio is the best and most versatile blogging tool there is. I am enjoying it immensely. Lots to play with.