I'd been thinking about bumper stickers a few days ago. I envision the logo, the website and one of a few catchy phrases, such as:

"Well Equipped"
"I'm Equipped, Are You?"
"Are You Equipped?"

or the more sedate versions:

"Prepared, Not Scared"
"The Boy Scouts Are RIght"

or perhaps even:

"There's a fine line between being paranoid and being prepared--learn the difference"

What about ETS logo gear options, such as a boonie hat with the logo, or other things with doubly practical nature (not that t-shirts and hats aren't practical).

I'd also vote for buying the already established products (I'm slowly building my collection) and the "contributor" icon.