Would be a nice feature if there was a history of the last 20 or so PMs received.
Something like so, in a text box or something:
account:nick:timestamp
Think it would be very useful for those servers like Zodiac, where you open a pm, then close it and forget who sent it... Could be something importiant in the PM, and you closed it because all the Mass Messages beforehand were nothing but spam and stuff.
Probably useful for other reasons too
Also, the box would clear when you leave the server and join another one? Unless you are VIP/Gold and you have global messaging.