An article ran on NPR today about an ingenious service where patients can report how much their medical procedures cost. This is great, especially for people with conditions like diabetes -- if your insurance only covers so much of your care, you'll want to shop around to get the best price possible. And some of the costs reported to this website varied quite a bit, illustrating the need to shop around first.
One of the things this site asked for costs on was, apparently, diabetic test strips. Bought without insurance, these things can cost you around a dollar a pop, making it a very good thing to be able to compare prices online.