Apple has confirmed all sorts of things to do with WWDC: they've confirmed that there will be a keynote, released the WWDC app for iOS devices, and have posted the talk schedule for attendees. There's not much else that can be said at this point, because until that keynote starts, we won't really know much about what new products or new software Apple will announce, although it's pretty likely that we'll see a Mountain Lion of some kind. RBC capital markets expects there to be new models of MacBook sometime later in Q2 2012, which would pave the way for a new iPhone later this year in either September or October. We've been waiting on Ivy Bridge-equipped machines for a little while now, so it's very likely that a MacBook update could happen sooner, rather than later.
Encrypting files on your Mac can be a bit of a hassle, but not with Espionage. MacStories has a review of Espionage for the Mac, which handles the encryption of files just like 1Password handles username and password combinations. It's extremely easy to encrypt or decrypt just about anything.
Macworld has spoken to developers about the imminent Mac App Store sandboxing deadline, and they all say the same thing: sandboxing will disadvantage users due to how it vastly limits the number of things users can do with apps from the Mac App Store.