I have a couple of spots left on my Tonga trips in August and Sept 2013
Trip 1: 21st August to 29th August
Trip 2: 28th August 5th Sept
Prices start from $2595 AUD (not including international flights) on a private chartered boat. The trip is absolutely awesome and swimming with the whales is truly humbling. These dates are in peak season and last years trips were fantastic!
More details here
Or email me on firstname.lastname@example.org