From notifications to new ways of accessing the phone, Android L’s lockscreen comes with a wealth of tweaks.
Quoted from Android L features revealed: Lock screen on android tablet – Yahoo News Search Results
All About Android delivers everything you want to know about Android each week--the biggest news, freshest hardware, best apps and geekiest how-tos -- with Android enthusiasts Jason Howell, Ron Android V1.6, codenamed "Donut," was released in September 2009. It fixed reboot errors in the OS, revamped photo and video features (i.e. camera interface), and featured better search integration.