Dave's Handsome Radio Blog! says:

10's Links: "When and if I'm ready, I'll move up to Moveable Type, hire Blogatelle, pay for a server, etc., but for now I enjoy this alternative."

I've seen this too often not to say something. I think Radio has a lot more features than Moveable Type. Sometimes people confuse difficulty with feature richness. MT is designed to run n Unix, which means that it can be difficult for average people, because Unix already presents a high barrier. Radio is designed for Mac and Windows users, not developers (although it has deep features when you lift the hood), so it has to be easy to set up and use to work.

I agree with David. But Radio is difficult in its own way.

When fun, cool, and powerful features are buried, awkward, or unreliable, that is a user experience design failure. When a blogger tries to explore and discover features, and can't, that is a UE design failure. When "basic" tasks are not self evident, that is a UE design failure.

Try some of these things:

• Delete a post from three months' ago.
• Set up a project klogging cluster. 
• Set up a blogroll.
• Choose which tools to install.
• Show links to an item's categories, and linkbacks, and Google citations.
• Make my template more accessible.

Now try these things without knowing html.

How is not obvious to naive newbies. In other words: newbie initial mental models don't correspond to the developer's mental models or the software's physical model.

Radio's rough edges remain a key issue, something of a barrier to uptake. Radio has been percolating for more than a year, flushing out hundreds of exciting capabilities, most delivered simply and explosively.

If it was my product (and it's not), my knee-jerk reaction: bring in a usability SWAT team to do their thing. Persona casting and profiling, task analysis, trials, measurement, design feedback, user experience patterns and an experience style guide. 

Double user success on the top 100 tasks:

1. open up new markets,
2. cut supports costs, and
3. makes the overall product more attractive to developers.