I'm using MT to create a website for a band. What I'd like to do is post show dates as individual entries, then the day after the show, it will no longer display. So, if I post a show that is on March 2, 2004, the show will display until March 3. Are there any nify plugins that can do this?

MTSomeDays that and a search for event AND calender should get you started.

Note that mt builds static pages, so you'll need MTRebuild and cron to make these 'disappear'.. or manually rebuild. =)