Here's a short video of Mustang Sally playing with Star. As it turns out, Sally really loves to be around other dogs--so she should be very adoptable.
She's very physical when she plays, with lots of mouthing, play-bites, and pawing, so I think she would be best placed in a home with another dog of similar size.
I took this video rather late in the day, and you can see that lazy Star is already exhausted from tumbling around. This is probably the most subdued of their playtimes so far. I'm going to try to remember to record them the next time they both get the crazy zoomies.