I love the Apple iPod charger.  Apple call it the iPod charger, but this is the same charger you get with the iPhone.

It supplies 5 volts @ 1 Amp.  Just what you want when you need to charge your non-Apple USB devices.  Pictured below are the iPhone 4 & BlackBerry 9000 Bold.  There‚Äôs three cables in the photo.  The missing device is the HTC Desire PDA, which I used to take the photo.

one chargerAnd the other thing I like about having one charger?  In my travel kit, I can take the one charger with me as a backup to using the laptop as a USB charger.