I recently started to backport the NetHack iPad codebase to the iPhone with the Slash’EM 0.0.7E7F3 core. The result is Slash’EM 1.0-b2 which is available as beta right now (signup required since some not so public information like device IDs have to be passed around). It’s not a continuation of the Slash’EM beta but a fresh codebase.
The new UI is, like the iPad version, based on my iHack framework. It is inventory centric, letting you access most actions directly from the inventory view, offers context specific actions on a tap on your char (like untrap if traps are adjacent) and offers some shortcuts (e.g. the E-word is always just 2 taps away, no typing whatsoever required).
So all in all I still hope to meet my original timeline for iPhone Slash’EM 🙂