The official listing for the "Pure Google" device now says "Soon with Android 4.1, Jelly Bean," and it had been shipping up until late Tuesday, following a federal judge's ruling that a preliminary injunction against the device would not be stayed. While Apple's lawsuit isn't scheduled to go to trial until the spring of 2014, U.S. District Judge Lucy Koh ruled that Samsung was unlikely to win, and that the PI was to stand. Google, for its part, had said it had a fix in the works, so we figured any delay in shipping would be brief, and that appears to be the case.
That also means that we likely will see an update push out over the air to existing devices, though what Google intends to change remains unclear. The lawsuit stemmed from the famed infamous '604 patent (aka the "Siri" patent), which protects searching multiple sources from a single interface, and using heuristics for the results. That's what Siri does, and it's also what Google's search bar does. It's not yet known whether the search bar will be removed (a drastic measure, to be sure), or if Google will change the way it searches and parses results.