So, here's my contribution. The goal was to keep the design as simple as possible
(for better scaling and variations such as monochromatic and inverted versions)
Alternate version with yellow outline:
Logo usage example - tshirt:
in small scales ...
@Bingo:
Of course, I can provide scalable vector images as well - in SVG format (using Inkscape for my vector drawings)
The font used for the logo and wordmark is 'New Athletic M54' and according to the author it should be possible to use it freely:
http://www.dafont.com/new-athletic-m54.font
(or try to email the author first)
I hope you like it.