I found the above photo over on Flickr and it's tagged as being taken at this year's SXSW music festival in Austin, Texas. I thought it fit well with the story I spotted on Treehugger (originally from the Wall Street Journal, which is subscription-only) about clean, green transportation in that city. You don't need to put any petroleum into this four-legged powertrain (emissions are another issue).
The MIT Technology Review has an article on plug-in hybrids and the electrical grid. The thesis of the piece is that wide-spread use of PHEVs, rather putting a strain on the electrical grid, could actually be beneficial and lead to strengthening of the grid over time. The idea is that these hybrids would predominantly be plugged in at night when there is less demand for electricity, than during the day.