Those of you who are familiar with F7U12 (FFFFFFFUUUUUUUUUUUU) comics will appreciate this: developer Jor dan has released a Forever Alone widget for the stock messaging app. When your unread SMS count is 0, the widget displays the Forever Alone face. When you have unread messages, it switches to the happy Forever Alone face (coincidentally, is there an official name for that?) and shows the count.
If this doesn't make sense to you because you're not familiar with the meme, perhaps the screenshots can help clarify:
Left: no unread messages because you're forever alone. Right: Yaaay, 2 unread messages!
The app is free and available now in the market.