There's a Apple program called AppleSeed that seeds copies of unreleased software to a select group of individuals before its public release, separate to those seeds provided to developers. Apple recently sent out an email to members of the AppleSeed program that prompted them to register the different pieces of Apple hardware they owned, saying they needed the information for "exclusive seeds" of future Apple software. This prompted 9to5Mac to speculate about hardware-specific features coming to future Apple products. Sparrow for Mac has been updated to version 1.6, which adds support for POP-based email accounts, along with unified folders for more than just your inbox. The update includes unified folders for starred and sent items, as well as drafts and trash, collecting all your starred, sent, drafts, or trash items across all your email accounts into the one unified mailbox for easier access.
Apple has updated the Mountain Lion developer preview build to 12A206j. No details on any new features in the build, but with WWDC coming up soon and Ivy Bridge Macs perhaps being released at the same time, Apple are in for a busy few months ahead.
If you're annoyed at the way the Library folder hides itself after every OS X update (even if you un-hid it manually), there's a small little script that can permanently unhide the Library folder for you.