I have a feeling that this is not what you are asking, but in case it is...

vmc push myapp --instances 2 --mem 64M --path ../mybits --url some-sub-domain.cloudfoundry.com --no-start -n
vmc create-service mongodb --bind myapp
vmc create-service mongodb --bind myapp
...
vmc create-service mongodb --bind myapp

If what you are trying to ask is to we support a mode of operation where this is a scale out mongodb service that lets you ask for 9 units of parallelism across a single document store, the answer is no, not yet. This is really a statement on the status of the mongo service, or sql service that's in the current code drop. Its totally feasible to implement a sql service that's configured for N read replicas, or a master-master system, etc. We have not done this in the current, open source services though.