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There were and have been others before,..
MSI Tegra
MSI Dual Screen
JooJoo (Crunchpad/TechCrunch)
Lenovo Ideapad U1 Hybrid
Vega - Converged Devices
Notion Ink Adam Smartpad
Freescale Tablet
http://www.engadget.com/2010/01/08/msi-shows-off-10-inch-android-tablet-running-new-tegra-chipset/
http://blog.laptopmag.com/msis-dual-screen-tablet-video-hands-on-much-more-than-an-ereader
https://thejoojoo.com/
http://www.engadget.com/2010/01/05/lenovo-ideapad-u1-hybrid-hands-on-and-impressions/
http://convergeddevices.net/products/vega.html
http://www.slashgear.com/notion-ink-tegra-android-smartpad-uses-pixel-qi-display-1866308/
http://www.ubergizmo.com/15/archives/2010/01/freescale-tablet.html
http://gizmodo.com/5459308/slate-showdown-ipad-vs-hp-slate-vs-joojoo-vs-android-tablets--more-updated