I'll be the first to admit it might just be me ;)

I prefer XML and haven't used JSON extensively enough to be proficient with it. If there are pluses to using JSON over XML I'm ignorant to them.

"Readmore" perhaps? ;)

HA, nice one! Any suggestions on where to start?

Here you go:

http://json.org http://en.wikipedia.org/wiki/JSON

I use JSON when I'm doing Ajax things. Jquery and Django both have methods to encode/ decode JSON.