i am using V9 and share the same problem.
I have a macro which exports a chart to a xls with ExportBiff and sends it via Email to specified users in my document.
This is triggered by the ON_POST_RELOAD Event.
When reloading manually or from commandline "Qv.exe /R Mydocument.qvw" or when calling this in the suporting tasks it works.
But its a p.i.t.a to create an extra external task for every Document i want to export and its a big problem to maintain this either.
Isnt there a solution within publisher for this?