I'm from Chinese Wikipedia, and an administrator of it.
I support to setup Cantonese Wikipedia.
In fact setting up Cantonese Wikipedia is not a new topic
for the Chinese Wikipedia community. some months ago, we had discussed
same topic about foundation of Min-nan Wikipedia.
At that time, some of us opposed to setup Min-nan Wikipedia,
but many of us agreed.
just see:
http://zh.wikipedia.org/wiki/Wikipedia:%E4%BA%92%E5%8A%A9%E5%AE%A2%E6%A0%88…
In fact the mordern Mandarin Chinese have absorbed many vocabulary and usage
from differnent Chinese dialect. I don't want to see Mandarin Chinese
dominate other dialects, they all are equal and can mutually inspiration each other.
Mandarin Chinese was setup only for convenience to people from different area of China,
it dosen't have any priority. That's my opinion.