Some interesting info on MSM

I've been seeing 'MSM' appear around here quite frequently....am always on the lookout for things that may be good for me and as a bonus boost hair growth/health! I was searching around for some info on MSM and was amazed by what I'd found. I found the following link particularly interesting

http://www.wwns.com/oxygen/msmfacts.htm

Anyone have anything further to share on this? What is good dosage? Is there such a thing as 'too much'? I've seen the capsules in both 1000mg and 500mg ??

Ideas, comments, thoughts would be most welcomed!!

i read you can't over dose on msm.