We need to bring this back!
In 1962, the interrobang (‽), was introduced by the New York publishing establishment as "a twentieth century punctuation mark". The interrobang combined the functions of a question mark and an exclamation point. It received some attention at first, but never caught on, although for a brief period during the 1960s it was added to some typewriter keyboards.
What a great symbol for the internet-enabled masses. How many times have you gotten a message that ended with the string of question marks and exclamation points. (ala ?!?!?). You can make the symbol with Unicode; just enter ‽.
Link [via BoingBoing]
UPDATE: Go figure, Microsoft, the king of standards, doesn't support the Unicode for the interrobang. If you're reading this post in IE, sorry. Try Firefox; it displays this properly and it's a hell of a lot safer.