This is what I found over in the covers forum:
CyberSportsBook.com Launches PXP Play By Play Wagering
Online Sports wagering will never be the same again
ST. JOHN’S, ANTIGUA--November 25, 2004--CyberSportsBook.com an Antiguan based, online gaming site, announced today the latest technological advancement in the world of online sports wagering, with its PXP – Live Play by Play Wagering (TM)(PXP) betting product.
Available only at CyberSportsBook.com, PXP – Play by Play Wagering will allow sports gambling enthusiasts the opportunity to make multiple individual wagers on every single play of a live football game.