I finally got some level of wide angle capability on my GH1. Picked up an Olympus WCON-08B wide angle conversion lens, which turns the 14-140 into a 10mm in 16:9 aspect ratio. It's a bit soft around the edges, but it works. Not bad for $45. Feel free to post your own wide angle shots.
Here are some of mine:
Panasonic GH1 + 14-140mm + Olympus WCON-08B (62mm); @14mm