Could be coincedental, but my 2.16 Macbook has been crashing like crazy since jailbreaking my UK iphone last week. Beachball all the time, kernel panics, freezes that won't unfreeze causing me to manually power off. All this has played havoc with my external HD which OSX only recognises some of the time... I'm running Leopard and thought maybe it might be that, but it seems to have got a lot worse at pretty much the same time as I (using one of the popular guides on here) jailbroke the phone. Anyone else had this?