Mick Beatle is still alive, and selling tunes on ebay. I think that havok collapsed when the distribution company folded and left various labels with massive debts. Smitten collapsed, as well as organgrinder and many others. A sad day for acid techno, but probably for the best, as it's sure to stay an underground sound without massive distribution contracts.
As for the best havok release, my favorite is 'king of comedy' with bill hicks sampled. Also Havok 27 (unreleased) is a top tune. As far as I know, there were only 10 copies pressed, I have 1 and Mick has another. Havok 28 has a good tune on it also, but again there are only 10 copies in existence......shame really