Nothing much but I chanced upon this while I was at Shibuya's TSUTAYA:
They had the posters, wristband, towel, pamphlet / postcard set, sticker set, pouch, bag, hand mirror, ring, and maybe others I may have missed out. Pity they don't have the T-shirt though

I bought the pamphlet and the bag.
There was also a book hanging at the side to write your wishes for Kuu's 10th anniversary