For those who spend plenty of time on the web, there's the USB Leg Warmers from Thanko to help keep you toasty warm.
Great for chilly days and evenings in front of your laptop, these nifty warmers plug easily into one of your computer's USB ports and quickly heat up to a cozy temperature. When you're ready to unplug, simply remove the cord from your computer and disconnect from the warmers. No one will be the wiser while you stay perfectly cozy. The sock-like warmers are super stretchy and extend from your ankle and over your knee.
They make the perfect accessory for those who want to heat up before heading out on frigid days or for anyone who stays at their desk for extended periods and feels the chill more than others.