http://www.telegraph.co.uk/technology/n ... usion.htmlExpressing sarcasm in the written word can be a dangerous business, as anyone forced to apologise for sending a tongue-in-cheek email will confirm. The SarcMark, as it has been named, is designed to be used in the same way as an exclamation or question mark.
Bit of a gimmick, also with a cost of $1.99. Maybe it will catch on with the younger folk.