PCWorld is linking to an HP catalog page that sure looks like it is for the HP Slate. Called the HP Slate 500, the page says it is running Windows 7 Premium, has a 9.4 inch screen, has both pen and touch input. Another link mentioned in the PCWorld article says that the HP Slate 500 is running a 1.6GHz processor.
It all looks quasi official and I’m guessing the button got pushed a bit early on this one. But given that we’ve been hearing about PalmPad trademarks and other HP Slate news of late, who knows.