I am at a hotel where you have to sign in to be connected, how do you do that with the Apple TV ? I am connected to wifi, but can't get the window to sign in.

Don't know if this will help you at all but i am at a hotel right now myself, and just figured out that the only way i was able to use apple tv at this hotel was to use my iPhone and connect to my AT&T "hotspot" wi-fi network. i then selected my iPhone's personal hotspot network in settings on the apple tv screen, and bam! everything worked like it did at home. :-)