A few days ago, a friend of mine told me about this so, I made some research and confirm it.
Just one month before the release of the CUPC 8.5 client, Cisco announce the release of Cisco Jabber at the Enterprise Connect 2011 trade show.
“Cisco Jabber a unified communications application that brings together presence, instant messaging (IM), voice and video, voice messaging, desktop sharing and conferencing into a single consistent experience across PCs, Macs, tablets and smart phones.”
You can see that this is similar to CUPC client, so you might get a little bit confused. Cisco Jabber is in fact an upgraded version of CUPC that will be rebranded. By adopting the XMPP standard protocol (aquisition of Jabber), integrating the interface and features of CUPC, Cisco Mobile and Cisco WebEx Connect.
The promise of Cisco is to provide a common interface and experience across differente platforms. It is not available yet for download and the first release will replace CUPC 7.1 for MAC (in 6 months) followed by other platform releases.
Update june 3rd: Jabber is now available and reviewed.