After playing around in inter-web-land for a few weeks I've finally set up my blog.
It's built on BlogEngine.NET with a custom theme I created based on the MS Expression Blend IDE. I also wrote a Silverlight Flickr control to decorate the masthead.
No problems with Silverlight/.NET - everything was plain sailing. HTML/CSS/Javascript gave me some hassle or rather the browser incompatibilities did (it's very similar to working in J2ME/BREW!)
I'm very happy with the direction Silverlight is taking. It's not there yet, but it's certainly moving in the right direction. There are a few gapping holes, like no proper 3D support, or any mobile support, but it's just a matter of time...