MacRumors reports that Apple today released the second Yosemite public beta for beta testers

The software update, build 14A329r, can be downloaded through the software update function of the Mac App Store. It's likely the new public beta bundles the content introduced in the last several developer updates, including multiple design changes added with DP 6. The last beta included new wallpapers, a new System Preferences design, a translucent dashboard, several icon updates, and more.

  Apple Releases Second OS X Yosemite Public Beta, iTunes 12 Update