Chui has released the beta 2 version of neo4all.
Here are the notes from the readme:
* Many speed ups
* Almost every game supported.
* Emulation speed boosted.
* Improved sound core.
* CDDA fixed in many games.
* Z80 core changed to MAMEZ80.
* Scanline flickering removed.
Find the binary here: http://chui.dcemu.co.uk/neo4all.shtml