Kumblr is a small application for tumblr.
It's not possible to post photos, audio and videos at the moment, but as soon as the underlying library supports it, Kumblr will to.
To use this under [X|K|U]buntu/Debian you'll need so install python-qt4, it should be named similar in other distributions as well.
The library that is used is calls pytumblr and can be found at http://hg.isawsome.net/hgwebdir.cgi/pytumblr/
Please post bugs, comments suggestions in the comments below and I'll try to answer them as quick as I can.