I have a new site covering the phonology and tones of Cantonese dialects (and all the othes). I'm still adding data, but you can currently view tone data for more than 40 dialects.
http://www.glossika.com/en/dict/lang.htm
The Cantonese tone data is here:
http://www.glossika.com/en/dict/tones/yue.htm
And a list of the dialects here:
http://www.glossika.com/en/dict/dialecty.htm
James Campbell