Withings Wifi Body Scale
It's a great scale. Takes a few minutes to set up, because you have to hook it up to your computer and run a program. When I got the scale, they only had Mac/Windows programs, not Linux.
The only downside is that it's not always consistent. I can step on/off the scale a few times and see the weight vary by a pound or more. That's really not good. But the convenience of uploading my data online is worth it for me. It can also send your data to Google Health if you want.