November 4, 2007 3:01 AM

Hotwire and Priceline

''Opaque'' sites are ones where you don't see the name of the supplying hotel or airline until after you've booked. At least, that's what they used to be. Today, the two sites offering ''opaque'' booking -- Hotwire and Priceline -- also offer choices where you can see the supplier up front. Bookings are nonrefundable, though some can be changed for a fee.

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