Just to save people some trouble, if you want to order the Firecracker X10  Com
port to RF interface, the current web page is:

   http://www.x10.com/welcome/firecracker/free_fire_landing1.htm

Click on the order button on the right side of the page.
They move around the order page every few days -- wierd.
The price is still $5.90
This is a fantastic deal, if you are into X10 control.
This page has links to software for Linux, etc. for command line utilities:

  http://eagle.cc.ukans.edu/~mturvey/firecracker.html

Regards,
   Ron Fial