It was only on Monday that Nokia confirmed its first laptop, but now DigiTimes suggests the Fins may use either Compal or Foxconn to build an ARM-based smartbook for 2010. If true, my guess is it'll run Maemo 5.
I say that because so-called smartbooks with ARM-based processors (like Qualcomm's Snapdragon chip) don't support Windows. And there's Nokia with its own Linux-based OS. We've also heard plenty of rumors (since denied) about Nokia looking at Android. We'll have to wait and see. [DigiTimes]