A branch by idnar for Athena landed a few days ago. I just noticed some output on a testing server which shows it off pretty nicely:

2006/02/17 20:07 EST [HTTPChannel,13,66.92.68.248] Traceback (most recent call last):
          File "", line 0, in

        --- <exception caught here> ---
          File "", line 0, in

          File "https://<hostname>/private/jsmodule/Divmod.Runtime", line 39, in ()

          File "https://<hostname>/private/jsmodule/Divmod", line 135, in ([object Object])

          File "", line 0, in apply([object Object],[object Array])

          File "https://<hostname>/private/jsmodule/Divmod.Defer", line 137, in callback([object Object],[object Object])

          File "https://<hostname>/private/jsmodule/Divmod", line 135, in ([object Object])

          File "", line 0, in apply([object Object],[object Array])

          File "https://<hostname>/private/jsmodule/Divmod.Defer", line 134, in _startRunCallbacks([object Object],[object Object])

          File "https://<hostname>/private/jsmodule/Divmod", line 135, in ()

          File "", line 0, in apply([object Object],[object Array])

          File "https://<hostname>/private/jsmodule/Divmod.Defer", line 108, in _runCallbacks([object Object])

          File "", line 0, in apply(null,[object Array])

          File "https://<hostname>/private/jsmodule/Nevow.Athena", line 259, in ([object Object])

          File "", line 0, in apply(null,[object Array])

          File "https://<hostname>/private/jsmodule/Nevow.Athena", line 191, in ("Nevow.Athena.callByAthenaID","s2c0",[object Array])

          File "", line 0, in apply(null,[object Array])

          File "https://<hostname>/private/jsmodule/Nevow.Athena", line 608, in (16,"setStatus",[object Array])

          File "https://<hostname>/private/jsmodule/Nevow.Athena", line 600, in (16)

          File "", line 0, in Error("0 nodes with athena id 16")

        nevow.athena.JSException: Error: 0 nodes with athena id 16

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