To mark the special occasion, Gamers in Akihabara are putting on a Bamboo Leaf Rhapsody/Tanabata themed exhibition in their main store from July 7.
Along with the exhibition, the store is selling some exclusive Haruhi Suzumiya anime-related goods, which can be pre-ordered online during the exhibition period which lasts until July 26.
You can order them from the Gamers Online Shop, or purchase them at the event in Akihabara until July 26.