It's quite straightforward:
- you must boot from local disk
- bundle your local drives in a RAID-1 group
- assign a pair of vHBAs to your profile for connectivity to your FC SAN (one to SAN "A", one to SAN "B")
- as far as networking in concerned, you have "carte blanche" (UC VMs use a single nic and Nexus 1000V is optional)
--> you could for instance create 6 vnics: 2 for service console, 2 for vmotion, 2 for vmdata. Or just 2 vnics and have Nexus 1000V "own" them. Any other scheme you find suitable is ok.
Most restrictions aren't on the UCS side but rather on specific VMware features currently supported by the solution.
See
http://www.cisco.com/en/US/prod/collateral/voicesw/ps6790/ps5748/ps378/solution_overview_c22-597556.html
http://docwiki.cisco.com/wiki/Unified_Communications_VMWare_Requirements
The OVA templates for the UC VMs are at http://docwiki.cisco.com/wiki/Unified_Communications_Virtualization_Downloads_%28including_OVA/OVF_Templates%29 --> you'll get an idea of storage capacity and vCPU requirements