Q. What's the deal with Y-Up and Q-Up fares?
A. These are restricted (as in there is a cancellation/change penalty) economy class fares that are cheaper than full fare economy class, and seated in first or business class.
You can find them on Travelocity or on the airline's web sites directly by choosing business or first class with restrictions when you do your search, or you can call the airlines directly and ask for them.
They are not offered on all routes, and they're not exactly cheap, but hey, they're definitely less than those refundable full fare economy fares, and you get to sit in business/first class.
These fares can be especially handy for business travelers looking to skirt office policy against buying business class fares.