We know you've got questions, and if you're brave enough to ask the world for answers, here's the outlet to do so. This week's Ask Engadget inquiry is coming to us from Dustin, who wants to turn the humble iPod Touch into a cash register for live events. If you're looking to send in an inquiry of your own, drop us a line at ask [at] engadget [dawt] com. "We currently have 10 credit card terminals we purchased three years ago, and we're looking to replace them thanks to their horrific failure rate and replacement cost. We only use them for special events, but they account for $24 million of our credit card revenue. Ideally I
