Good points. OTOH they don't allow attachments and text can be compressed pretty well, plus I somehow doubt most people are sending new messages daily or even m

Good points. OTOH they don't allow attachments and text can be compressed pretty well, plus I somehow doubt most people are sending new messages daily or even monthly. The friends I use it with all write one or two emails to each recipient to be delivered in x years, where recipients won't even know about the existence thereof until x years later. We then tend to reply to each of those messages once after receiving. I personally try to write 3 messages to myself for delivery in 1, 3, and 5 years... the longer the delay, the greater the level of retrospective silliness. Overall I think there isn't a lot of traffic and it's such an obscure service, every person I've mentioned it to has never even heard of it. It sure would be interesting to see some stats though! :)