Building Brand New Ports: How?, looking for a straightforward example Options

[ZDevil]

I've also been searching for handy references on building new ports that are not present in the port tree.
There are quite a number of handy apps especially suitable for handhelds like the Z, although they are not in the port tree yet.
Too bad that the official man pages (e.g. pkg_create(1) w/ 8 pages of options (!), not to mention the giant bsd.port.mk(5)) simply list a whole lot of options without a simple and straightforward demonstration/example. And I just got overwhelmed and confused after reading them ...
So has anyone here created any new port (not necessarily for Z)? Could you show me how to do it in reality (not in theory)?
Just a very simple real example (e.g. grun, less, etc.) will do, so that I (and others interested) will have a clear starting point and be able to proceed with RTFM?
Any input is much appreciated!