Here's one for the weird science files. According to Slate, you can survive in space for a limited time without a space suit. Just make sure you don't hold your breath when you try it, and make sure your exposure is less than 15 seconds. Nonetheless, you might instead want to wear a suit if you think your exposure will be longer than that.
To that end, MIT aeronautics and astronautics and engineering systems diva professor Dava Newman is leading the development of a new skin-tight suit that will greatly reduce the bulk of suits, increasing the agility possible while on a space walk. These suits remind me of those worn in the space walk scene of the movie Star Trek: First Contact.