NarniaResources.com has updated again! You can now send E-cards and E-vites to invite your friends to Narnia events (registration required). (View page) There are four themes to choose from.
Here is an example of a Theme 4 invitation:
NarniaResources.com has also posted an invitation from Lee Strobel (author of The Case for Christ) to attend a Narnia Sneak Peek Event. (View here)