Bumble is open source and hosted by you rather than using a third party service, so you can change and extend it in any way you like, perfect for a personal blog but still allow for funky features to be added, which is why I'm building, to replace wordpress on http://teabass.com
Look forward to seeing it :). I'm beginning my own take on the blog thing, I'm making the concept in Python. Will post some details as I progress.