So here's the thing: I've got 2 blog software solutions I can offer: Textpattern and Wordpress.
Textpattern is more flexible but has a bigger learning curve and it uses Textile instead of an RTF-Editor (like on this board). You can check out the use of Textile here, it's very easy once you get the hang of it.
As for the blog itself I can setup the accounts, offer you the space and a subdomain, such as http://life.rationalskepticism.org or you can use your own (sub)domain if you have access to the DNS/IP records (which you need to point to this server).
Optionally your blog can be linked on our upcoming site once it's ready (when it's done

Just respond here or drop me a PM if you're interested.