Have you used pingg before? They have fantastic online invitations and ecards, and give you the opportunity to send a hard copy too! Pingg offers mutiple social media options to get your event details out to the masses and even create a web page of your online invitation with additional accessories (we all LOVE accessories!) like videos, maps, charity & payment options - really, is there anything pingg doesn't do?
Take peek at some of my designs already online and please use them for your next online invitation or ecard!