the plugin - Booking Calendar, is already exist http://wordpress.org/extend/plugins/booking/
but from today its unavailble in WordPress directory.
If logged in user try to make download of latest version:
http://downloads.wordpress.org/plugin/booking.2.9.zip its generate "404 File not found".
Plugin is also do not available for not logged in users by this link http://wordpress.org/extend/plugins/booking/
There was no any changes in plugin during today or yesterday, its just stop working.
Please help, or if I need to contact someone alse please advise.