I do a lot of our supply shopping on several different Web sites, so I'm a proponent of using the technology. There are obvious advantages to shopping online: It's generally faster and more convenient. It's the you-can-shop-in-your-pajamas idea that non-healthcare online retailers push. But healthcare supply sites' features go beyond those that, say, Amazon.com offers. Ideally, they can help you make better purchasing decisions. Here's what you should be looking for if you're thinking of putting down the phone and picking up the mouse.