A number of publications have released official overviews of the latest OS X Yosemite beta build alongside word of Apple's plans to open up the public beta tomorrow, July 24



From MacRumors:

As noted by The Loop, the public beta of Yosemite will be the same build released to developers on Monday.The public beta version of OS X Yosemite is the same version released to developers on Monday, so to start off, consumers and developers will be running the same software. However, the developer version of Yosemite will be updated more often over the next few months than the public beta version. This is so developers can continue to test their software with the latest operating system available.

  OS X Yosemite Public Beta Launches Tomorrow, July 24