After doing a search on WiFi LED light bulbs a few came up on eBay that are controlled with a supplied remote, so they are basically RF (radio frequency).

What I found really interesting was Philips has come up with a LED bulb design called Hue that uses your WiFi (router) that can control a space or even the whole house from your iphone.    It should be really interesting to change the colors and brightness in your space. Imagine being able to change the color of your lamps to a soft shade of blue where you work to help with what some researchers say alertness. How about set the mood at Dinner or go to a fun color while you are hitting that work out that has become typical.