The Artwizz is a perfect companion when times is not a computer within reach. For compatibility, I started in my circle of friends once a small test action.
The following devices I've tested:
iriver U10
NEX iA
NEX iA +
Maxfield Sin Touch
Palm Tungsten T2
All have worked perfectly. Man, however, should first plug in the power cord and then only the device, because some devices (see Maxfield) does not start otherwise.
The only what to look for, is that coming via a normal USB port max 5V at 500mA. However, this charger provides up to 1A. It could be that some (mostly favorable) Batteries not react at a faster loading time, but a short Todesglimmen. So make sure to first read the technical specifications of the device.
If that is taken into account is recommendable without the Artwizz.