Man! Just when we were starting to get used to using iOS 4′s folder system, the jailbreak community comes along and one-ups the whole thing. After months of work, Japanese iPhone developer ashikase has released this preview video of FolderEnhancer, a jailbreak-only modification which.. well, enhances folders.

Sure, sure — 90% of iPhone owners are probably just fine without pages in folders, sub-foldering hierarchies, multi-icon moving, and all of the other poweruser-focused goodies within FolderEnhancer. But for the other 10%: don’t worry, a jailbreak for iOS 4.1/4.2 probably isn’t too far off.

Already jailbroken? Expect FolderEnhancer to go live on Cydia “by the end of this month”, according to ashikase.

[Thanks André!]