So finally Resource Mailbox properties exposed to Exchange Management Console (EMC) in Exchange 2010 which we used to set in OWA or with PowerShell in Exchange 2007.
Here are list of new tabs available in Exchange 2010 Resource mailbox properties.
Now I am sure you can set these properties more quickly after creating resource mailboxes. 
Reference: Configure Mailbox User Properties
[...] Resource Mailbox Properties in EMC [...]
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