Apple had announced the availability of the OS X Yosemite Public Beta during WWDC and by tomorrow, that will be released to the public who had signed up for it. This public beta is available to the first million who signed up and at this time, it is still available here.
The public beta released tomorrow will be the same as the developers’ version but it will not be updated as frequently as the latter. Updates will still be released via Software Update provided within OS X and this will include the final version as well.
However, Apple has advised that as this is still a Beta – the public is advised not to run it on their primary machine, as it should for most beta softwares.
So if you’d like to try OS X Yosemite before the official launch – do go sign up for the Public Beta now and wait for the email with the download code.