After I left Just Arrive last year, the kiosk software was ported to the Windows platform so that it could run on a Radiant kiosk that was hardened for outdoor use. It appears that a blogger that lives close to the installation at the National Aquarium at Baltimore found a way to cause the kiosk to malfunction. It turns out that the exploit he found isn't really significant, as it doesn't allow escalation of privileges. I wonder if the same vulnerability applies to other versions of the kiosk that run Linux (our preferred OS, but impossible on the Radiant kiosks).
In any case, it's interesting that everything out there that can be hacked, probably will be. I wonder if similar exploits have been discovered for ATMs? For electronic voting machines? If there were, would they be reported so freely?