I've always pronounced it "Ma
shinarium" too. I get the confusion with ma
ckinations, but I thought that both mackinations and mashinations were accepted in English? So, in analogy, maybe both are correct for Machinarium as well???
I don't get the comparison with the Latin "deus ex machina", though, because the pronounciation there is closer to ma-he-na (the 'he'-part being like the word), imo. No 'sh'-sound, no 'k'-sound.
Anyway, Botanicula looks awesome. It's one of the few titles that made my "list of games to play" before it was even released.
I'll probably play it right after working through Machinarium. That's still a while off, though...