Release Notes for CM:
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/rel_notes/11_0_1/CUCM_BK_R30921A8_00_CUCM_release-notes_1101.html
Release Notes For CUC:
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/11x/release/notes/11_0_1cucrn.html
For new and updates features on any UC product, always look for the Release Notes
Regards
Deepak