Describe Online Communities here....
There are several photo sharing groups for Mississauga found on Flickr
Mississauga http://www.flickr.com/groups/mississauga
My Mississauga Is http://www.flickr.com/groups/mymississaugais
Mississauga Camera Club http://www.flickr.com/groups/mccflickr
Mississauga Photography http://www.flickr.com/groups/mississaugapictures
Wikisauga http://www.flickr.com/groups/wikisauga
Mississauga Bus Stops http://www.flickr.com/groups/mississauga_bus_stops