Square D and Cutler-Hammer both have informational sheet available about this. IAEI ran a few articles about AFCIs a few moths back. Sorry, I don't have links on hand for these, but should be fairly easy to search for.
I wish I had something to contribute here, as this would be a great discussion topic, but have no helpful references - still looking for the "Motherload" website
I still need to become fully aquainted with AFCI devices and complete [complex] methods of operation.
Yes, after I posted the above message I checked these links via the link you placed in the other message [jeez, what a mouthfull It a vicious cycle! remind me to Kil-A-Cycle - bad attempt at humor using KHz reference ]