@nynaevelan: On the Touch & PW, this (along with the latest released version) works in tandem with ixtab's Collections Manager
on the Kindle side. (And checking the 'Assume this is a Touch' option in the plugin's settings on Windows).
That means a jailbroken device, and a slightly different workflow. With my latest changes, I end up spending *less* time managing collections than on my K3 for my own workflow, with nested Collections as a nice bonus, but for more complex/different stuff, it might not be as fast/simple. (In particular, keeping a full Kindle <=> Calibre bidirectional sync can be a bit annoying. It's far easier/faster/forgiving on the Calibre => Kindle side [That doesn't mean you can't handle stuff on the Kindle, you can, but managing those completely on the Kindle side of things will probably be faster/easier]).