A couple of new computers have made a splash, both of which have a lot of potential for operations where commercial power is not available. 

Aleutia solar powered PC

(Lifehacker.com) - Aleutia has created a 4.5 inch solar powered Linux computer called the "E1."  E1 runs on only 8 watts of power, has no moving parts and is completely silent. 

From their website:

•  During peak performance, the E1 consumes just 8W of power, 4% of what a typical (200W) desktop uses. Runs off a car battery or a cheap solar panel.

• Keep Working During Power Cuts! A UPS that will keep a standard desktop running for 15 minutes will power an E1 for 6.5 hours!
• Everything is stored on a CF card, which can be instantly removed to ensure security of your information.
• Efficient web browser for slow Internet connections.

• Ultra-portable version: E1 with 8" Display, foldable solar panel, and lightweight battery.
• Fits in laptop bag, takes 5 minutes to set up.
• Display and E1 run for 3.5 hours on a charge. Can recharge by car.

Follow this link to read more!

Asus Eee Laptop & Brunton Solar Panel 

Also an option for remote operation is the ASUS Eee laptop, coupled with a Brunton Solaris 26 portable solar panel.   This option consumes a little more power (14W idle, 18W peak), but is cheaper and more compact.