And when I was there in November 2007, the PASMO was pretty much the same, although I never tried to use it for a taxi. I was even able to replenish my PASMO card at a JR station, and when I realized I had a fair amount left on it at the end of my stay, I used it to take the ¥1,000 Keisei train out to Narita, a real bargain and only 30 minutes longer than the Skyliner.
I never tried to buy one at Narita, but if I can, that's a great deal for the next time I take a trip that's limited to the Shutoken.