Can any dynamo hub get the electricity rotating with the spokes? I want to make wheel LEDs powered by a dynamo hub. I was wondering if that's even possible. Any ideas or models?
Reelight do something similar but opposite: they mount magnets on the spokes and the light and coils on the frame.  This demonstrates that it's broadly possible.  You'd need to mount the magnet on the fork or seat-/chain-stay with a coil and light on the wheel.  This gapped dynamo arrangement won't be very efficient, but wheel lights don't need to be as powerful as headlights.  This is the most promising approach, and could be tested with basic kit (I'm tempted to play myself, but have work to do).  For experimenting, I strongly suggest working on the back wheel - if something breaks and jams the wheel, you're much less likely to get hurt than if you jam the front wheel; testing on a trainer would also be possible if you have access to the right type.  Yes it's harder to see what's going on, but a camera/buddy would be better for that anyway.  Also you can spin the back wheel fast more easily for a bench test, by hand-cranking the pedals.

An alternative approach would require electrically insulating spokes. Carbon fibre spokes exist but are expensive and rare.  You may be able to get an insulating washer under the nipple, perhaps using an anodised nipple as well.  You'd then set up one connection through the hub and the other using a brush (or single copper spring) against the rim (beware wear on your rim, use one that's brake-compatible).  Neither connection would be great.

One thing that wouldn't work is adapting one of those torches (flashlights) that works by shaking a magnet in a coil (notionally strapping it to the spokes).  At speeds over about 6&nbsp;km/h (4&nbsp;mph, walking pace) the centrifugal force will push the magnet outwards more the gravity will pull it downwards (you can tweak things to roughly double this number at best.

Something that could be made to work but would  be dangerous is mounting a bottle dynamo inside the spokes, with a ring-shaped track attached to the frame for it to run on.  I mention this only to dismiss it, and don't recommend it