MOS 1.5 has been rumoured for some time in the next year, so don't get your hopes up! 1.4.2 is good, but you'll need to find our own TCP/IP stanck from somewhere (the one that comes with OS3.9, Genesis, will work with it apparently - though it doesn't do DHCP so broadband has to be run through a router set to static IP addresses).
As for downloading with AWeb, have you got the Public License 3.5 Beta version? Works a treat here!