Zen Stone Plus -- packing in a hefty 4GB of flash memory, no less. Besides the capacity bump, the unannounced upgrade is also said to boost battery life to a more respectable 12 hours and add support for unprotected AAC files, clearly a move designed to sway fans of the iTunes Plus DRM-free music selection. Being a rumor and all, we don't even have a clue as to when you can expect to see the latest Stone on store shelves, so keep your eyes peeled.
Update: Now Crave is reporting that an 8GB Stone Plus is also forthcoming. Stay tuned throughout the day as this supposed capacity continues to increase.
[Thanks, Daniel M.]