That shirt was pretty snazzy, and I regret missing the Tech Demo Kickstarter altogether. (I regret missing out on the Dogslicer Ale shirt even more, though.)
*Warning, Digression Ahead*
Speaking of the Kickstarter rewards, I enjoyed the PFS Chronicle Sheet that was included with the second Kickstarter campaign.
There are PFS Chronicle Sheets associated with reading the Pathfinder novels. It would be pretty cool if certain accomplishments in PFO qualified you for more novelty Chronicle Sheets. Things like defeating your first escalation, sacking your first enemy settlement, or completing a really high tier of the Kill Lots of Goblins Achievement.