Here’s what I think: if you need a special font to indicate where you want to insert sarcasm, you need to work on your writing skills. Written sarcasm should be self-evident. Not everyone thinks so. From The Huffington Post:
We who spend our days IMing, Facebooking, Tweeting and so on have said it time and time again: there is a great need for a sarcasm font. Well, it looks like our social networking prayers have finally been answered by a company called Twitterblitz, started by three New York interns working at Bartle Bogle Hegarty (BBH). The solution? Sartalics.The full story is here.