Leaving us so soon? BumpTop, the OS overlay specialist that gave Windows 7 touchscreen PCs a great reason to exist back in early 2009, seems to be pulling the plug on its one and only claim to fame. In a somewhat terse update posted to the site, the company -- which just outed a Mac version of their software in January -- has been acquired by Google, which means that BumpTop (for both Windows and Mac) will "no longer be available for sale." This plug pulling also means that no future updates are planned, but if you're not shaken by suc