In the VI toolkit 1.5 for windows there is a cmdlet to list the rules
Get-DrsRule
Retrieves the
list of Drs rules for the specified clusters. Each rule defines the
virtual machines that can run on the same host (affinity rule) or must
run on different hosts (anti-affinity).
There is also a perl script to list the affinity rules check this thread
http://communities.vmware.com/message/987594
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