minips2dev is not only restricted to opl building. it's just what most people use it for. you can install extra software to it, it's just preconfigured for ps2 homebrew development.
the topic is about adding ps2 toolchain to a linux distro. which is what i did exactly, with some helper scripts. and i added it to a live distro.
Yes, there are two valid approaches here, and they both can useful depending on how the home and/or office PC environment are set for doing the things.
Therefore, "VirtualBox + Yoshi314's minips2dev VM" and "Ubuntu Netbook Edition v10.04 Live Pendrive + izdubar & jimmikaelkael's Ubuntu PS2SDK scripts" can be used not only for compiling OPL, but also for homebrew development in general.
And a medal of honor should be delivered to misfire, who has made an great contribution for all homebrew community when mirroring all important PS2DEV stuff into Bitbucket repo.