My company's travel agent (AMEX Corporate Travel) apparently uses Galileo, because my business trip plans are always available through http://www.viewtrip.com. As has been posted before, trips booked directly with United, although the PNR is of the same format, are not viewable through viewtrip. Perhaps that's part of what saves the airlines money when you purchase a ticket directly from them - that they can use their own reservation system, and avoid a fee to sabre or galileo.