A:AnswerIt's available for preorder elsewhere already. Has been for a while. Looks like Best Buy has no love for Fuji X. It appears that they don't even sell the 55-200 anymore. They used to have that lens in stock at the stores.
A:AnswerNo both the camera and the optional battery grip have tripod mounts. With the grip on the camera tripod mount is used to secure the grip to the body, so there is an additional mount on the bottom of the grip. See attached image.
A:AnswerUnfortunately, I think the Fujifilm cameras from Best Buy are only available online. Even the Best Buy with the most photography gear in my state doesn't stock them.