It's not available in the UK either - give it time I guess...
As long as you can survive til step 3, you're good to go.
Read my guide to convert Chameleon to Clover UEFI:
http://www.tonymacx86.com/hp-probook-mavericks/112383-guide-install-mavericks-clover-bootloader.html
If you don't want to take this risk, do a clean install.
Thanks for the help - I have followed the instructions and I am now on Mavericks with Clover. However, I have lost audio and battery status - do you know where I can the relevant info to patch this?
It is, Im downloading it now.
How did you get it? Seems even people in the US are struggling to get it currently!
Thanks nguyenmac it worked (duh..)
Doesn't work for me. I have an 8460p with latest Clover and PBI CE. Followed the guide exactly, but when I try to actually install Yosemite it takes about a minute to "prepare" then it wants to reboot. After coming back from reboot it just goes into normal login screen, not the install screen.
Not quite sure. I do have membership of the developer program, but the download is the regular one through the app store without logging into my dev account.