After being addicted to TiddlyWiki and using it as my notepad exclusively, I've essentially started using it as my blog engine as well. It works really well.
I considered somehow resurrect my blog, but lacking immediate static IP address sucks a bit. At the end, I figure I should evaluate both Spaces and Blogspot.
For the time being, I'll use Spaces. Because I'm an avid MSN Messenger user and Spaces ties in quite well with it. I do have some issues with automatically updating Spaces from TiddlyWiki - if I can't resolve this soon I might have to reevaluate everything.