Just ordered one myself, Great portable charging option and come highly recommended.
Mentioned alot on the iPhone discussion pages:-http://discussions.apple.com/forum.jspa?forumID=1274&start=0
The powermonkey comes 60% pre-charged so it's ready to use, straight out of the box! To get the most out of your monkey, simply use the included mains adaptor to fully charge the powermonkey and you will get up to 96 hours standby on your mobile phone, 40 hours on your iPod, 6 hours on your Sony PSP, 2 full charges on your PDA plus it's original charge and up to 1600 pictures on your digital camera! The powermonkey will even hold its charge without leakage for up to 6 months!
Powermonkey comes with:
* 1 x powermonkey Unit
* 1 x Universal Mains adaptor
* Adaptor for Nokia and Mini Nokia, Motorola V66, Samsung E900, Siemens C25 and Sony Ericsson wide connector
* 1 x Mini USB for Motorola Razr V series, Blackberry and Bluetooth headsets
* 1 x Direct iPod adaptor
* 1 x USB smart phones, PDA and other devices
* 1 x Connector for Sony PSP and most digital cameras
* 1 x Black travel pouch
Thanks to rodney_jxl for pointing out a better price than orignally posted (mymemory):http://www.mymemory.co.uk/Portable-Power/Power-Traveller/PowerMonkey-Portable-Charger
And Quidco available