Just saw in my Facebook feed that Taos has secured exchange days with Copper Mountain, which probably means Copper will make a similar announcement.
Seems the new ownership at Taos is getting a lot more friendly with exchange days- with a Taos pass, one also gets:
3 days at Purg
3 days at A Basin
3 days (with lodging :( at Crested Butte)
1 unguided day at Silverton
3 days at Powder Mountain
3 Days at Copper.
With the exception of Purg (Decent-ish mountain but not really worth leaving Taos to go ski), that is a hell of lot of quality skiing. The pass is also a lot cheaper than their season passes used to be (with the reasonable limitation imo that you only get 70 days and don't ski Taos over Christmas-New Years).
With the Silverton deal and (what I suspect to soon see) Taos days added to the Copper pass, it really looks like a Taos trek may be in order...