Crazy Taxi: Fare Wars review at Gamespy.

"Crazy Taxi fans, get ready to relive your cab driving addictions on the go. Exclusively developed for the PSP, Crazy Taxi: Fare Wars includes the original Dreamcast classics, Crazy Taxi and Crazy Taxi 2. The rules to the game are easy. Just pick up customers and drive them to their destinations before you run out of time. Seem too simple to be good? Anyone who played the arcade version knows better than that."

Full Source: Gamespy