Tested on Firefox only. Please let me know on Tumblr (http://www.geekinthejeep.tumblr.com/) with any possible alignment issues, questions, or requests!
The icons in the second screenshot are also my own work, and can be found here - [http://freestyler.ws/style/85857/tumblr-glee-icon-set]

I hope I'm not stepping on any toes by making this when there are other similar versions available. I couldn't find any others that kept the link to the Tumblr dashboard in the logo, so I made one myself.