The iPhone already has its own clock and alarm built into it, but what about cheapos who need a real, manly clock? You can get a dedicated "clock" for only $US1, you late people!
LCD Clock will display the time and calendar while you are charging your iPhone or even enjoying your music with a dock speaker. It can switch back to 12-hour or 24-hour mode easily, just by tapping the screen. There is an alarm function too, but it won't work if your iPhone is in silent mode. There's no guarantee it will work when your iPhone is asleep or locked either—fortunately, there is an option to disable auto-locking.
With the calendar, you can flick up to see the next six months, with Japanese or U.S. holidays highlighted. If you're in Japan, you can also display the Japanese "Rokuyou" calendar. The calender will also remind you of birthdays and anniversaries. With multiple date and time display options, LCD Clock also gives you the ability to change the display colour. Now, if you'll excuse me, I have a purchase to make (Jason, I promise you I can wake up!).