They talked about the HP Slate in January, and at the time commented:

It certainly seems that 2010 will be filled with entries in the tablet PC market, though, providing users with a variety of options for flat-panel, touch-screen, Web-enabled devices to replace more cumbersome netbooks and notebooks.
It remains to be seen if the Apple "iSlate" or Microsoft "Courier" will actually materialize, but HP, Dell, Lenovo, Fusion Garage, and a plethora of other manufacturers are all lining up a diverse array of tablet PC's to release this year.
I must admit, I like my Netbook, so I'm not rushing out to buy an iTampon clone from anyone.