Well, I ordered one and have just got round to connecting it up on the fixie hack bike.
This is what's in the pack:
A cheap-looking bottle dymano, wires, box of magic and a clever mount for the phone. The phone is held securely using a grippy 'rubber' base which has loops that pass though the box of electronics and around the phone - a good way to make it compatable with different models of phone without being bulky. The drawback is that it can cover bits of the screen on some models.
As I am already running dymano hubs on 2 of the bikes, I wanted to break into the
home-made lighting circuit and be able to switch between phone, lights and off.
A collection of the parts needed: bullet connectors (this is what Nokia use), switch, case (old jewelery box) & a bridge rectifier (rather than re-use the old one that was fitted to the dymo connector.
Soldered up:
...and ready to run:
I'll write a report when I've had a chance to use it, but basically it works.
I would only tend to use it on longer rides out of town as I don't think the breaks in charging when stop/starting are going to do anything any good.
It does allow me to use a fairly cheap phone as a GPS or a Sat-nav without running the battery down quickly
in daylight.