If you've been hankering after a ring-flash and fancy an LED version, have a look at Reflecta's new LED Ring Light. It has 49 LEDs that should last 100,000 hours, are easily dimmable, and range from 6,500K to 5,900K. To help get the light distribution you want, there's also a 60 degree tilt feature. And it'll run off of a DC adaptor or two AA batteries.
Included in the kit are a RRL 49-Makro, six Adapter rings (49, 52, 55, 58, 62, and 67mm), a universal mount, a Sony adapter shoe and a hot shoe.
They're available now and should cost in the region of £85.