MEDL Technology's portable LCD display "The Panel" sounded like the perfect laptop sidekick, but would you really want to slip the 13.3-inch screen into your messenger bag? We invited company co-founder Eric Liao -- and his prototype Panel -- to a local Starbucks to find out. The verdict? Lightweight and incredibly easy to use, but at this point most features (including those all-important analog video inputs) aren't quite ready for primetime. Housed in a silvery frame that perfectly matched the brushed aluminum finish of our Mac and Dell laptops, the screen was equally easy to hook up to either one. Using a DisplayLink USB gr