Apple is on point lately with updating Yosemite and today they seeded build 14A314h to developers. It’s just been a week after seeding a build to developer for testing.
As always, the beta build is available through the Software Update in the Mac App Store and through the Mac Dev Center if you are a developer.
It remains unclear what improvements build 14A314h update will bring to Yosemite, but it is likely to include bug fixes and stability enhancements to the current build. As always, make sure to backup your current machine before you push any updates to your machine. If you find any bugs, please report them in the comment section.