For starters try NYBOT.com
Sugar, nice and steady, a lot of calendar spread volume a lot of daily volume with 12-18 pt range.
Coffee-you are on your own their my friend, very volatile had more than their fair shre of limit up/down days. Pit brokers can butcher your order, so don't give mkt orders to many times.
cocoa- genrally quiet markets punctuated by 3 standard deviation moves 1-2 a year.
Check out spread book by courtney smith which deals a little bit about softs.
Good luck