Challenge? What Challenge? I am still using a Q800 for CAD (Vellum), Word, Excel, and about a dozen others. When I travel, I download a copy of the apps I'll be needing onto the 320 MB HD on my trusty Duo 280c. This isn't a challenge, it's just what I do. The small screen and lack of a FPU slows me down a bit, but it all works well.