Doug,
In regards to Converged Infra this one can be tricky sometimes when you get into the Infra Layer of the model, but in the finance layer should be somewhat straight-forward. You would most like purchase these devices and be able to tag them in the Fixed Asset Ledger to go to the Tower \ Sub-Tower of Compute - Converged Infra. In addition, you would have potentially some software costs and then labor costs (i.e. Sys Admins that would be configuring the appliances).
Once it's up into the IT Resource Towers, these devices would be stored typically in the CMDB, which can be backed to the Servers Triangle. Being able to call out those appliances you can create your relationship to the servers for Converged Infra. Now, these appliances may not support applications, but if they did they would route to the apps that they support, but if not they would be routed to the Business Services layer.
Cheers,
Ryan