Offline Messaging

[McGherkin]

I was wondering when I saw the '<username> recieved <amount> from <sender> (offline)' message, whether messages could be sent in this way.

I was thinking maybe it could use the current server PM system, but when the user is offline, the message is stored until that person logs on, at which point it is displayed to them.

It'd be handy for things like payments, where you can pay someone, then send them a short message saying what the payment is for. Or if a team leader wants to get a team member to check the team forum when they come online, they can just drop a quick note to the member.

It wouldn't be for long messages, but it'd be fine for quick notes.

Thinking something along the lines of:
[MSG][Piggy501]:Sent you €10000 for that LX4 ; )

(although the yellow would stand out in chat, obviously)

What do you guys think?