Students have been asking for pillows to be put in McCabe since at least 1970 to be used by all those "who want to sleep but don't want to make the long trek back to [their] rooms." (Phoenix, 12/15/70).
This suggestion has remained popular over the years, but due to concerns about hygiene, has yet to be enacted. We do have ridiculously large bean bags though, so I guess we're getting closer to that promised land of pillow-y goodness!