A nice new 2.0 trend - specialization. Sure, I like AJAX, but I'm not ready to post my entire life goals, dreams, and weekly schedule just because of a slick interface with rounded-corners.
Simple Seating is a great web-application that serves a simple, focused purpose. Having an event? Here's how to make a seating chart. Choose your guest, drag 'n drop him at his table. You can even choose their menu. After you're done it's easy to print the chart and table lists. There's also all kinds of data import/export options (i.e. load your info from Excel).
This might not seem very useful or scholarly to you now, but remember this site...it's going to come in handy so time soon.