I have a lot of phone meetings and getting the timezone right requires constant vigilance. I had more than one meeting not come off because I or someone else messed up the timezone thing. Now that I'm working with John Gotze from Denmark on some things, its even harder. John clued me into a handy web site though that helps. Using the personal worldclock you can create a personalized collection of clocks showing the time in various cities. Here's one showing Salt Lake and Copenhagen. There's also a meeting planner and a fixed time calculator. Very handy.