These are just a few examples of sites using the Ajax Availability Calendar script.
If you would like to see your website listed here, drop me a line via the contact
form and I will consider including it.
The script (version 3) has been downloaded 91500 times since Feb 2010.
Unfortunately I don't have any official figures as to how many sites are using the calendar, but estimates from a specific keyword search in Google makes me believe there are over 5000 sites currently using the calendar.