adapter that works with iPhone 3G

[jc]

I installed a Blitzsafe iPod adapter in my car a couple of years ago
http://www.discountcarstereo.com/detail.aspx?ID=793
and have been extremely pleased with it.

I recently bought an iPhone 3G, and while the audio interface works
great, the adapter will not *charge* the phone. Apparently, the 3G has
to see USB levels to charge. Several of my other docks won't
charge it either.

Anyway, Blitzsafe doesn't seem to have updated their product
line yet. Does anyone know of an equivalent adapter that will
(fully) work with the iPhone 3G?

Thanks,
jc