Release 9b is out, first post updated with the download link.
* polymorph now reflects too, scroll of remove curse will return you back to human form
When polymorphed to some other creature you keep your inventory and can use all the items like before, but your health, attack and defence are modified. You don't get spell casting abilities of the creature, but you obtain traits like flying, fire immunity or invisibility. If you turn yourself into a jelly you will get cloned upon being hit, or if you are a zombie you will let out a cloud of gas, or if you are a vampire you get extra speed and transference.
* stealth and sneaking
It sounded nice but it wasn't really much help without the stealth ring, and with it there was little difference. Now when in sneaking mode monsters have less chance to see you. This makes a difference and I'd say it's balanced to fit the game perfectly as moving slowly seem quite adequate penalty for gaining that extra stealth. It's actually useful for only rare occasions and is the last thing you want to be relying on, but it's a nice feature to have, it just fits.