Wow and wow! This came at the perfect time...I want to take a short (4 day) tour and don't want to have to lug my computer to charge my Walkman. I'll have to check into this.

(A bit later) I checked out solar power w/Amazon and found one that charges quickly and allows you to use your device at the same time. Of course, there's always a downside...the price, but there are options at all ends of the price scale that will do the job.