Some package compilation help

I am very familiar with Gentoo's package distribution, which does not 
distribute binaries, but instead distributes e-builds, which are 
essentially templates to build package binaries from source.  To update 
the source tree to the latest available revisions, you use 'emerge sync' 
or you can download the latest portage snapshot from a Gentoo mirror.  
To update to the latest stable release, you just use emerge, to update 
to the latest beta, you set ACCEPT_KEYWORDS="~arch", where arch is your 
system architecture (like x86 or ppc).
My question is, is there something similar in NetBSD?   Could someone 
fill in the blanks below?

Gentoo command                         NetBSD equivalent
------------------------                         -------------------------
emerge {pkg}                                cd /usr/pkgsrc/{pkg} ; make 
; make install
qpkg {pkg}                                     pkg_info {pkg}
emerge sync                                            ?
ACCEPT_KEYWORDS="~ppc" emerge {pkg}                         ?