There is always a question as a developer as to where we can find the complete list of filters available. Weather it is in How to components? or in Bex's book? I think here is some thing that we can do to get the complete list.
Go to Traceing section and select Full Verbose check box and select System and Services from the drop down
Remove all other options
Click on View Server Out Put and click on Clear button
Now run any service ex: DOC INFO or DOC UPDATE
Come back to View SErver Out put page and click on Refresh
You will see the list of filters called.
You can write a small component to hook to any filter and in the component you can print the local variables availble with System.out.println(binder.toString())