We are looking for the same SCOM functionality and have not found anything specifically for nimble. We are thinking that we can use SNMP and, since Nimble is Linux based, also possibly use the Linux Pack. ... some info on both here:
Setting up SNMP Monitoring in SCOM 2012
SNMP Management pack for Unix/Linux
Hope that helps.
Nimble does not have a SCOM most pack today. This does appear to be on the "futures" though, because we want to have more parity with what's available in VMware. No published dates on roadmap items, of course, but keep an eye for something before long.
Don't mean to be overly vague, but we simply don't want to make promises we can't keep.