Apple's best-selling MP3 player? According to AppleInsider it turns out it's the 4GB iPod mini, which is perceived by consumers as being a better deal than both the 1GB iPod shuffle, which costs fifty bucks less, and the 6GB iPod mini, which costs fifty bucks more (sales of the 1GB iPod shuffle are said to be way down while the 60GB iPod photo is reportedly selling just as poorly as ever). Then they cryptically hint about how Apple is working on some sort of cross between the iPod mini and the iPod shuffle, though what exactly that would be isn't clear (that's why it's cryptic, ya dig?). A 4GB flash-based mini? A 2GB mini without a screen? Just how many more iPod lines does Apple think they can pump out?