I've never been there but have looked into going there. The Pindari is SE of the Nanda Devi Sanctuary - the peaks at the NW end of the valley form the SE wall of the Sanctuary.
Around the Pindari Gl there are some nice peaks like Panwali Dwar (6663m) and and Nanda Kot (6861m) and some high passes that are rarely crossed. I think Changuch (6322m) is still unclimbed. Maybe that's why NOLS is going there.