What a neat idea. It's basically email, but it knows where you are and where your pen-pal is, and doesn't deliver the email until the appropriate snail-mail time between those locations passes? Brilliant.

i'd not heard of Slowly; googled, etc.

how sort of perversely lovely (i say it in an admiring manner), to meet in a gloriously old-fashioned manner on such a modern platform!

love it.

I've made many good, long-term friends through penpal sites, including my wife as well!