Occasionally in recent months, I've bemoaned the lack of innovation in blog platforms. However, I'm not being very precise in my use of language there. What I actually mean is the lack of innovation in self-hosted blog platforms - ones you actually upload to your own servers. In the world of hosted blog platforms there's a whole world of interesting stuff going on. Tumblr, Posterous, Typepad Micro and Squarespace are all creating new paradigms for the blog platform, one that I want to explore more in the coming months. For example, I've spent part of this morning setting up a group blog on Posterous for a work-related event coming up soon.