PHRACK 57 released, very interesting articles.
IA64 shellcode - papasutra
Vudo malloc tricks - MaXX
Once upon a free() - anonymous
Architecture spanning shellcode - eugene
Writing ia32 alphanumeric shellcodes - rix
your self to code exploits: Gera's Insecure Programming page.
"Here you can find a collection of exercises that will help you teach yourself the art of insecure programs exploitation. I
t's not complete, but it's minted to open your mind. The idea is NOT to use any human help. In case you doubt it, we
could exploit all but two of them, stay calm and good luck"