Hi ya'll,
Your resident tinkerer reporting in. I've already done a /rules mod to quickly check rules, a greeter mod to alert players to a newcomer ("Don't bite newbs!") and now I'm working on a mod to allow Private Messaging on a minetest server.
The idea is that it's a chat command (/pm USER) that checks to see if the user is online, if yes, sends via server, if no, sends when the player comes online.
Oh yes. I'm planning to roll the three mods in one when I eventually release the mod.
[hr]
EDIT - Aug 6 10:22 PM:
sdzen's whisper mod allows for messaging a player, but I don't think it allows "offline" messaging. I'll be using that mod as the base, adding in "offline" support.