Yep, I've been in touch with them. I have not heard much at all, other than the email got lost somewhere in their pile.

As for confusion over power supplies, that's a design flaw in my book. :-) 4 hours is bugger all for a modern tail light, it'd do in a commute but only just.

Any long distance run, forget it, and its long distance runs that I see this being most useful.