Happy Cinco de Mayo! This Mexican holiday is best celebrated with a frosty margarita in your hand, so what better way to geek out and get your tequila on than with an iPhone app that'll find you the nearest margarita-shakin' bar? The Bar Findr Touch ($2) uses your phone's GPS to seek out the nearest bars to fete the fifth of May. And once you're limed and salted, if you want to actually be up on Read more