Mykonos accommodation

This is my first post. Hello to all from the Greek islands!
This is a very busy time. In July & August Mykonos & Santorini are packed with tourists. Especialy Greek and Italians.
www.mykonos.net is a great site to find details and accommodation for the island of Mykonos.
However it is extremely difficult to find any availability from now till 20 August.