Over at the Daring Fireball blog John Gruber has an update on his review of the Richard Solo iPhone battery charger. The 1800 model has a bit nicer design, a locking mechanism for connection to the iPhone, and more power so it can fully recharge the iPhone.
http://daringfireball.net/2008/11/richard_solo_1800
The new battery charger also can charge iPods and has a flashlight and laser pointer capability.
The Richard Solo 1800 sells for $70 US (currently $86.06 + $4.30 GST = $90.36 CDN total) and ships to Canada for free.