Pingg - Invitations

http://www.pingg.com - Evite may be the most commonly used, but Pingg is a new invitation company with some interesting features.

• Much better looking images than Evite, and the ability to upload your own pictures.
  
• Can purchase other stock images for a truly custom look.
  
• Invites can be sent via Email, SMS, Web, Facebook or even Snail Mail. For a surely classy twist, for a $1.50, you can send printed invites via postal service.
  
• You can import Contacts from Plaxo, Gmail, and more.
  

I haven't had an event to try this on, but I built some trial invites, and they look very nice.