A paper on fastflux malware: http://honeyblog.org/junkyard/paper/fastflux-malware08.pdf

A cheat-sheet on malware reversing from fellow handler Lenny Zeltser: http://www.zeltser.com/reverse-malware/reverse-malware-cheat-sheet.html

A malware challenge site for those wanting to sharpen their skills: http://www.malwarechallenge.info/