"Hacking iSeries" references and links
Just started to go through the blackhat europe 2006 media archives and found something useful to keep a note of (expect many more posts as I go).
iSeries (more commonly known as AS/400) is not something which there's a wide understanding of, both in IT security and pen testing (IME of course)
This site seems to have a load of good links and an eBook on hacking iSeries .. Also here's a link to the blackhat presentation which has a lot of good info. on the topic Hacking iSeries Presentation