@bobo. I use this to charge my iPod as well as a Garmin Forerunner each via their respective USB cables connected to the Flip Video Power Adapter. Works well for these two and should work for other devices that charge via USB.
I tried with the iPhone charger, and it did NOT charge the Flip. Also a car charger made for the iPhone did not charge it. I assume it is the same for an iPod charger....
Once I got home from a mini weekend vacation, I hooked the dead Flip into the Mac's USB and it charged it halfway in less than 30 minutes. I could have used a laptop or the power charger during the vacation as it died in less than 2 hours.
Yes, iPod/iPhone chargers are actually rated the same so it is safe. Since this is the case, you can actually use your iPod/iPhone chargers to charge the Flip and save yourself some money. I recommend buying a cheap USB extension cable so you don't have to hang the Flip off the charger itself in case it's in an inconvenient location. However, iPad chargers are rated at 2.1 Amps (double what this adapter puts out).