"Very large" - "high resolution" -- etc. :)

I'd like to have the option to put it on tshirts, hats, coffee mugs, etc.. not for profit, but as a promotional tool at ham fests and what not. So that needs to be pretty big..

If not a single logo, several variants of the same theme.. I'd like to brand the site and have a very specific and unique look.

HamIsland - Amateur Radio's Online Revolution (keep that theme in mind)