hello, i'm looking towards picking up an iMac. i know it was just updated recently (March 2009) but i was wondering, after checking out the MR's buyer's guide, i've noticed the iMacs only seem to update once a year. is this true? i'm fairly sure there are more slight updates during a one year period. anyway, i was hoping to wait until Snow Leopard was released before picking one up, and rumors are that it might be released sometime in Sept or Oct. of this year. i'm fairly sure the mac lineup updates sometime around then as well does anyone know if this trend is true?