There are certainly a lot of little things out there.
We were there in August and "discovered" them in our trip, which were great additions to our trip.
1. Tokyo Disneyland Mail box
They have mail boxes where you can mail out letters and postcards inside the park. The mail will have a special Disney stamp choped on it.
You can buy postcards and stamps in the shops while inside the park and write the cards while waiting for parades or rides.
30th anniversary means special postage stamps! It is a whole sheet of beautiful stamps with Disney characters. Or you can also buy regular postage stamps.
(Hint: The Disney stamp chop is quite big actually. Leave a big blank space for it. It doesn't go on top of the postage stamps but on the blank space of the card. If there is no blank space, it would cover part of your writing on the postcard.)
Details:
http://www.tokyodisneyresort.co.jp/en/tdl/guest/in/mailbox/index.html
2. Print photos with Tokyo Disney borders!!
There are machines where you put in your SD card to print your own photos with Tokyo Disney borders!!!!! We chose some of our group photos and added on the 30th Anniversary border. They came out great and it felt so good to get the pics so quickly!! For 52yen per print, it is totally worth to do a few. The pick up is close to the exit of the park, so you can do it right before you leave the park.
Details:
http://www.tokyodisneyresort.co.jp/en/tdl/guest/in/photoexpress/index.html
3. English guide map and schedules
You have to go to their customer service place called "Main Street House" to ask for English guide maps. It is to the left after you enter the gates. English maps are not readily out in the park, so you got to go there for the updated map and event schedule.
http://www.tokyodisneyresort.co.jp/en/tdl/guest/langservice/index.html