The original is 1800 x 1800 pixels and 240 colors. Was designed to scale to an icon or smaller and still look recognizable. Sorry it's not a vector image. =(
Stupid forum is resizing (poorly) the attachment so I'm embedding.
My only preference is for the word FreeEMS to be one piece as I just typed it, and to not use the diyefi burnout machine logo, and to have a logo at all. Beyond that its fairly free form, we can put a vote to it when there are enough decent ones up. I know Rob (who did the diyefi one) is going to have a crack at some stage. There is no particular hurry though.
Had a few spare minutes and came up with these. The first two are modified from old Briggs & Straton logos that I found http://www.steamengine.com.au/misc/logos/index.html
I liked the Lister logo but didn't have time to make a similar script.
They're a bit rough, just floating a few ideas out there.