Another fan of Pelican here. I've also written a theme for it [1]. One let's you use IPython Notebook for your Markdown + code.

I use S3 to host my blog. It's super cheap and it's really easy to push out changes with S3cmd [2]. Just a simple:

  s3cmd put mydir/* s3://mybucket/

1. https://github.com/gjreda/gregreda.com/tree/master/theme

2. http://s3tools.org/s3cmd