A clean line on the battery housing and thinned out plastic on the front bezel for "glowing" camera and microphone "in-use" indicators. Improvements for robustness include: a steel plate in the keyboard area; a smaller battery cavity; rubber "bunny ears", thicker bumpers and ribbing made out of pure polycarbonate, a longer keyboard cable, and a water resistance in touch-pad area.For me and many others, the most prominent new feature is the brightly colored XO on the back cover of the laptop that has 400 unique XO color combinations. This big XO is much louder than personalizing stickers and really makes the OLPC XO stand out in the classroom.
Improvements for usage include: increased display tilt; improved keyboard feel and responsiveness; improved touch-pad responsiveness; a gray bezel around the display; improved fit and finish of the buttons; X and O indicators on the touch-pad buttons
And while I know people will think I'm OLPC bashing when I say this, I have a very honest concern: isn't the XO upside down?
See how others orientate their laptop stickers - even OLPC stickers. They place them to be right-side up when the laptop is on a desk. This is 180 degrees different from the orientation when held by a handle near the hinge.
Could this really be an intentional OLPC design, an upside down icon when the XO computer is in use? Or is this a design error made in the rush to meet the September production deadline?
Either way, every time I see a student using a BTest-3, I wonder why the "XO child" is doing a headstand.