The geek side of me is really tempted to desert Tumblr and move to Github Pages and Jekyll. Reminds me of the time I used Nanoblogger.
I wasn’t sure about what could be acheived using Jekyll - most of the sites I looked at are quite simple, but then I found this one which is a really nice implementation on Jekyll, so the only thing holding me back is time - And it’s not like I have a stack of spare time on my hands, so the ease of use of Tumblr is likely to win out for the time being.