NX01,
my two cents: from the security side, cm3 is a great leap forward. at last avaya turned its wheels and adopted ssh protocol which is available now for system administration instead of telnet, sftp for val boards instead of ftp, cms r13 now supports ssh and cti solution that is now called application enabling services also supports encryption between switch and aes server. on the voip side, encryption now supported not only for ip phones and trunks but also for media gateway signaling.
switch part: as it was said before, cm3 now supports auto fallback for h.248 media gateways without connection loss. very good one. also now it is possible to upgrade duplex (s8700) servers one after one without loss of connection. another one: locally sourced announcements and music. it means that you can use different announcements and music on the local media gateways with the same announcement extension number, switch will determine itself which one to use (you can override it, of course). ah, and now at last you can use announcement as a music on hold source! finally. another one: q.sig support for unicode. good for international use.
oh well, forgot the greatest one: mixed port network connectivity! it means that if you have s8700 multi-connect system, you can now add new epns over ip and you're not limited to fiber. very long-awaited one, that.
there are a lot of new hardware available for cm2 and cm3, especially good for remote locations, tiny to large. g150, g250 and g350 media gateways, new tn2602 medpro boards for up to 320 voip codecs, new tn793cp (programmable!) analog circuit pack, new tn2464cp ds1 circuit pack and more. can't remember it all just offhand.
by the way, trunk ports in cm3 are not counted at all. in cm2 their cost was $0.01 but customers were required to order them, in cm3 there is no part number for trunk port at all. neither for tdm nor ip. good for tandem switches, this one.

also starting with cm2 there are some features available at no cost comparing to cm1: tenant partitioning, for example, basic call center, universal license for tdm and ip users, multi-national locations and many more.
there are two long-awaited features scheduled for 3.0.1 that should be available in sep '05: ip phone signaling encryption and emergency calls from unregistered ip phones.
now to the call center part. the most visible changes in cc 3.0 are: 100 aux reason codes instead of 10 (requires cms r13 with specific software load) and more advanced variables in vectors.
huh. sorry, got tired.

there are too many changes to describe in one post. life is going on and on, you know.
