Not sure if this is something that everyone is interested in or not. I would like to start a thread with an ongoing list of commemorative/event postmarks that are available and where they can be acquired.
Here is the only one I know of right now:
Address Postmaster Santa Claus Station Santa Claus, IN 47579-9998
This will be available on working days between Dec. 1 & 24.
Hopefully this thread will take off and become a bevy of info.
Are you referring to all commemorative postmarks or just those pertaining to the upcoming holiday season?
In any event, I posted this in another thread, but here's how to obtain the pictorial cancel for North Pole, AK:
Do keep in mind the US Postal Service's Postal Bulletin has information on most new pictorial cancels and how to obtain them in each bi-weekly issue of their Bulletin, readily available on their website.