Infinity/Ghoomakad hackbase will be the venue for first few days. There is a big mud hall and a secondary hall is available for doing workshops. Up to 25 people can be accommodated in Ghoomakad or in the neighboring houses of the village. 8mbps connectivity is provided by Vayudoot.
Country Lodge is the main venue for Hillhacks conference talks, workshops, and accommodation. It's in Dharamshala itself, walking distance to Kotwali Bazar and down to the post-office bus station.
The countrylodge has internet connection via vayudoot (thanks very much to those guys) and there will be some backup from Air Jaldi, too.