We've seen quite a bit of resignation notes in the IT world over the years, but this one takes the cake when it comes to originality. Jonathan Schwartz, CEO of Sun Microsystems, has tweeted his resignation, explaining it with a haiku poem: "Today's my last day at Sun. I'll miss it. Seems only fitting to end on a #haiku. Financial crisis/Stalled too many customers/CEO no more"

The reasons for Schwartz's resignation were more or less known from before; recently, Oracle has acquired Sun, and Oracle CEO Larry Ellison said in an interview last week he expects Schwartz to resign. Last week, Schwartz already announced that he's probably resigning, tweeting a link to his last blog at Sun.

According to The New York Times, Schwartz was the first Fortune 200 boss to tweet his resignation. Well, why not — if you have to leave, you might as well leave in style.