We have a fairly basic Branding guide on our website here:
http://team3309.org/branding
Mostly it encompasses visual representations like the video bumper and logo variations.
It's changed over the last few years, however; we started with just the FB logo, then added the variation with the 'Friarbots' arc underneath, then added the two 3309 logos this year (with the same visual theme) because we realized that including our team logo was most important in context of FIRST.