[Crunchy in milk]

My understanding of it is a little sketchy too, I seem to recall it was an invention of Bao-Dur's and he has quite the build up of remorse at his involvement. You can get snippets of info about it through dialogue with him (no influence required, just time and levels). Should you begin to slip to the dark side, Bao-Dur will also confront Kreia and ask her to leave, but she measures his opinion of her as evil, against the near destruction of a 'certain planet' under the effects of a huge gravitational device (malachor V) that was employed by Iridonians (Bao-Dur's race).

There is also of course the stupid Remote quest on Malachor its self that goes absolutely nowhere because the majority of the droid side quests where cut before release. Something occurs between HK/G0T0 and the Remote. But you never see this, just G0T0 showing up...