If you're an affected employee I'd suggest getting a proper lawyer asap because I'm pretty sure you'll need to act proactively in order to make sure you don't suffer financially and its not exactly plain sailing so you'll need someone to hold your hand (and no an IT forum does not count). Oh and do this fast...like the second the liquidation is announced (watch the gov gazette - liquidations must be announced).
(Pty) Ltd protection can be stripped if a judge feels it was intentionally abused - meaning the debt hits the directors/shareholders in their personal capacity so liquidation isn't necessarily going to save the day for him. I don't think they do this often though.
http://www.findanattorney.co.za/content_piercing-corporate-veil
In general the new companies act is written in such a way that if 1) the directors did something wrong 2) someone is out to get them, then they will go down in flames. Section 22, 76 and 77 come to mind.
The chances of him walking away are very slim if one or more employees decides to go on a crusade.
Also, as far as I know... should SARS not get their money from him, they may come after the employees for unpaid taxes...
Maybe. Or more likely SARS will attempt to collect from the employees, then the employees will cry foul and then the whole thing will go to court.