Rainbow Six: Lockdown
Ubisoft has issued a release for the game Rainbow Six: Lockdown with an expected date for consoles in September 2005 and the pc version (after all the kinks are worked out hopefully) in 1st quarter 2006 see here more info: http://forums.ubi.com/eve/ubb.x/a/tpc/f/8081011862/m/4571047913
Following a chat on irc with the developers of Ubisoft's next Rainbow Six game 1up.com is reporting more details on what to expect from the following chapter including weapon attachments and the unforgettable heartbeat sensor (new features and effects). The PC version is contemplating a respawning feature and will have the capability of hosting online games for 16 players or possibly more. Interestingly in such a tactical game the Havok physics engine will be much more interactive (you might knock a flowerpot over alerting enemies to your presence) and the network code has been rebuilt in an effort to detect cheaters.
