Newest Rom is working flawlessly for Internet Sharing via TalynOne's wifirouter hack.
Mac OSX V.10.4.10 with the wifi router hack instructions followed in TalynOne's instructions. Works with my vista machine and at the same time my mac. Nothing was needed to set up the connection, as it appeared in the list of computer networks from the AirPort drop list. Just follow the instructions @
http://forum.xda-developers.com/showthread.php?t=341398
No help with syncing fles yet on the mac.