We're calling it, folks: famed jailbreak hacker, Comex, has uncovered another PDF exploit in iOS that will allow for a userland jailbreak, ala JailbreakMe.
This is based off the above teaser image, which Comex just announced on his Twitter and is available for viewing on jailbreakme.com. If our detective work is correct, we expect a new, untethered, userland jailbreak for iOS.