I just spotted two ways to keep in touch that are as easy as sending an email, but way more fun and beautiful: 1. a telegram [seriously!] and 2. a Cartogram.
Telegram Stop will send your recipient a traditional telegram; all you have to do is type your message on their website, preview it, then pay and it's sent. All for only $5.65, which is about the same price as a nice greeting card.
Cartolina's new app prettys up your messages, and also keeps track of dates for you. [Available at the iTunes store for $2.99] If only it worked on Wall posts!
Let me know if you end up trying one of them!
[Telegram via Swissmiss; Cartogram via Design Sponge]