I'd have to say that they may be upgrading their softtware and the reasons the tourneys are off is that there is nothing more annoying than your game freezing up for 15-45min while the upgrade takes place....just a thought, it happened to me once, not only me but all on the site, the only thing we could do for 1/2 hr is chat or surf for porn(what else do us guys do while waiting for a game)
Ive not seen this happen before on pokerstars, i know close all tables for the server restart or whatever it is but i think they stop all tournaments playing before they do there restart and only leave the ring games up.