Rumours are starting to spread that HP has killed the 'Slate' tablet that was shown at CES. I guess now that they've acquired Palm, they may be re-thinking the viability of Windows 7 on a low-power mobile device. Or, more likely, they saw how bad Windows 7 performed on a low power mobile device and decided that Palm's WebOS was a better bet.
On a somewhat related note, Microsoft has confirmed that the 'Courier' dual-screen tablet is not really a product but nothing more than concepts for future technologies that may one day find their way into future products. I doubt it was ever more than a way to take attention away from the iPad and Google's Chromium OS.