E-Invites

Can't say I'm going down the e-invite route myself but I am creating a website with a mailing list, so I can email information to people. Maybe that's an idea for you instead?

Have you tried http://www.paperlesspost.com/cards/category/wedding-invitations1

A friend has used them for her wedding this year, if you are looking for something simple and within your colour scheme. I think you pay a one off payment for them, I think about £16. They were lovely though and still nice to open up, with separate inserts etc.

We used paperless post for our Save the Dates. They've got a really good selection of invitations and there are different price options. I'd highly recommended them.