SmartHomes web site sells dimable CFL's but the price is fairly hefty at about $17 each. They say that the bulbs are tested and X10 friendly. They also sell some neat bulb shapes as well. I just got a 7watt (40 watt equivalent) in a small round globe configuration. Works great with X10!
(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)----KDR
I purchased the small 7 watt non dimable to install in a Socket Rocket but the dimable 23 watt CFL was on backorder. When they get them in stock I plan to get one and test it with 2 wire switches and lamp modules.
(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)----KDR