We've had a number of posts on making unique seating charts for your wedding, but this is the first on actually planning who sits where.  A new website named SimpleSeating.com is a free (for up to 50 guests) on-line tool for you to design your seating layout, and

SimpleSeating.com is the fastest and easiest way to make seating charts online. Experience the power of expensive desktop seating chart applications on the web without the learning curve. Create, preview, and print your seating charts in just a few simple steps.

We can't comment on its ease of use, since everyone has a different definition of "easy".  But it's tough to go wrong with a drag an drop interface.  If you're in need of a seating chart for any reason, check out SimpleSeating.com at http://www.simpleseating.com/.

(hat tip: Lifehacker)