Anyone heard of something called Prolotherapy?

Someone brought it to my attention in another forum and at first it
sounded promising, but after checking the webiste
<http://www.prolotherapy.com> it started to look like a bunch of hooey!
Peopel started going nuts in the forum over this with many people
claiming it really worked and many others brushing it aside.

I have horribly bad knees (bone on bone) and just want to find out more
about it. any help from anyone out there would be great. thanks.

.