The OLPC is showing off the latest prototype of their affordable tablet for developing countries, the XO 3.0. It sports:

• an optional indoor/outdoor Pixel Qi display (a technology that we called a winner in 2010, developed by former Dream Jobber Mary Lou Jepsen) 
• a hand crank and solar panel for power (six minutes of cranking for an hour of power)
• a Marvell Armada PXA618 ARM-based system-on-a-chip that allows the tablet to run on just 2 Watts. (We also profiled Marvell CEO Sehat Sutardja last year.

The OLPC hasn’t finalized the price, because they’re still deciding on materials, but they’re shooting for under $100.

Still, they’re not the only bargain tablet-maker around these days. The Canadian company Datawind has garnered lots of attention for their Aakash Ubislate 7, a tablet device that the Indian governmnet plans to sell for a subsidized price of less than $50.

For more, check out Gizmodo’s quick video, or The Verge’s in-depth reveiw.