Well, I have been looking at both of these for a while now and finally placed my orders.
First a new product hand built and shipped directly from Germany - A very tiny and light dynamo that runs on the rim instead of in the hub or on the tire. This dynamo is supposed to be even lower drag when operating than any other as it has a lower output; it is tuned to meet the needs of modern LED lights only and not overbuilt to power Halogen lights so it is lighter (60 - 75g), smaller and supposedly quieter. http://www.velogical-engineering.com/rim-dynamo-en
I am coupling this with a new Edelux II from Peter White. http://peterwhitecycles.com/schmidt-headlights.asp
I will write a full review of both when I get them installed later this month. Until then, does anyone have experience with either if these yet? I am particularly interested in anyone that has tried the Velogical dynamo. They have shipped many to the US so far but I have not yet seen any US reviews.