A few minutes ago, Twitter lit up like a jack o'lantern with word that Apple's long-anticipated email invitations to the October announcement event have arrived in inboxes near and far. The media event, to be held at the California Theatre in San Jose, will serve as the finale for months of speculation on the widely rumored "iPad mini" shrink of Apple's market-leading tablet computer. Engadget's got the invite graphic -- "a little more to
