about optimisation

about download directories

about parallel builds

about determining endianess (aka net-snmp, openssl, hping etc style)

about PACKAGES_DYNAMIC

about LEAD_SONAME

about "python () {" - looks like it is always run when a recipe is parsed? see pam/libpam

about SRCDATE with svn/cvs?

about INHIBIT_DEFAULT_DEPS?

about COMPATIBLE_MACHINE and COMPATIBLE_HOST

about SUID binaries, and the need for postinst to fix them up

about passwd and group (some comment in install scripts section already).