I picked up one of
these... with a switchable analog or digital (8-direction) mode, it seemed like just the thing, in combination with a $10 Playstation-to-USB game controller cable from Radio Shack. It was better than the Logitech, but still no cigar. The left-right motion was OK, but for some reason it was really easy for me to go up instead of down and vice versa. It failed the Pac-Man test miserably; I barely cleaned off the first screen before losing my 3 lives.
Back to the drawing board... at this rate I may end up springing for the X-arcade one.