Recent IBM/Lenovo ThinkPad models have HDAPS (Hard Drive Active Protection System) support. HDAP's ShockMgr API is accessible to developers, by reverse engineering. For scripting languages like Perl, it's pretty straightforward to read the Accelerometer data from ShockMgr device.
So here it comes: ThinkPad Saber. It would be familiar as a ThinkPad clone of MacSaber if you're a Mac Geek.