I went there last year, it is actually quite hard to find as the maps in Japan dont have the North at the 12 o'clock direction. They dont have many exciting stuffs, but still enough to calm us in Asia. ANd given the level of Japanese Yen, I guess it might not be wise to shop there.
Do you mind if I ask, are you from Japan? Do you have access to the yahoo auction site there? It would be lovely if we playmofriends could build contacts in Japan~~!!! What kind of specials do they still carry in playmoland?? Would love to get some older ones if it is convenient~~!! 
They have all specials as they have plenty of Karstadt Kids Menu exclusive boxes... as decoration of the shop. Older ones they sell are American Football Player and American Fireman.
To be honest I didn't by a thing in this shop, but I did by plenty in Mandarake Akihabara (E.T. basis, viking battering ram, first smile stackable figure).
Unfortunatly, I am not so often in Japan but I have some contacts in the country. Regarding local auction websites, some japanese people work as intermediates for US or Europe would-like-to-be-bidders : they do the bidding for you, pay the amount to seller, and resend goods to given address and they are taking a minimum 10% fee on auction final price => Total amount is : Auction Final Price + Fee + Shipping cost within Japan + Shipping cost abroad Japan + Bank fee (+ Paypal fee if you pay the intermediate by Paypal)