Cue Wein Products.
If you dig through their pages, you'll eventually find the "Safe Sync" product page, touting their sync adapters for high-voltage professional photo lighting.
Half-way down the page, though, is the "Digital Smart Slave" product line. It's got pretty much nothing to do with the "Safe Sync" products, as far as I can tell.
It seems, from what I've been able to gather, to be the best optical slave trigger module on the market. It definitely opens up some new lighting opportunities.