Australian Solar Power Tower
http://www.enviromission.com.au 

I was recently talking with a friend about my Mobile HotSpot Tracking idea. He pointed out that some phones are GPS enabled. When a cell phone manufacture claims they are GPS enabled it’s likely that the GPS they are referring to is not satellite based. Cell phone towers are used to triangulate the position of the phone. The problem with this is that I don’t have a way to access Mobile Phone Company backend to mashup with Google Maps API.

Engadget.com posted an article regarding tracking down a kidnapped baby who was in the car along with the cell phone when it was stolen. The process for acquiring the position for the cell phone was at best two-and-a-half hours. Not so good for real-time tracking.
See Article:
http://gps.engadget.com/2006/01/12/sprint-employee-refuses-to-divulge-kidnapped-babys-gps-info/

There is a home for sale in my area with soloar pannel.
Listing Details Price: $639,000 (Sale)
Property Type: Single Family
MLS#: 20529804
Year Built: 1990
Street Address: 1049 Hampshire Ln
Lot Sq. Ft.: 6,600 (approx.)
City: Windsor
Acreage: 0.152 (approx.)
County: Sonoma
Bldg Sq. Ft.: 1,990 (approx.)
Bedrooms: 4
Bathrooms: 3
Comments :
Pride of Ownership! Beautiful 4 Bdrm, 3Ba, 1990 sq. ft. Freshly painted, New Wood Laminate, New Armstrong Lino, 3 new low flow toilets, Skylight in Master Bath, 2 Attic Fans, 7 Ceiling Fans, Pellet Stove, Solar Powered Home! 3 car garage with RV Parking! Also to Sweeten this up, $5000 carpet or closing cost credit at closing!

Source:
http://www.greathomes.org/property.asp?PropID=20529804&cat=1

Looks kind of ugly. I am begining to have second thoughts about spending $25k to have this pannels installed. The ROI is supposed to be 5-7 years