I want to thank everybody who has responded with their alpha 2 feedback. I am sorry that I have not been able to reply to each individual post, but rest assured I have been reading all the posts carefully and making notes -- my TODO list is growing by the day. 
From what I have been able to gather, it seems as if the keyboard language/layout problem is currently the issue which is affecting the most users. It also looks as if the UNetbootin issues are only partially resolved with some people reporting successful installs, while others have experienced failures.
With regards to the keyboard problem, it looks as if the language selection which is chosen during the installation is not being carried through to the installed system. I am not too sure why this is happening, but I will look into it and try to get it fixed before the next build. Meanwhile, I will create a "known issues" topic with details about how to change the default system keyboard layout.
With regards to the UNetbootin issues, this could be more difficult to pin down as there are so many different variables involved. Maybe a good place to start would be to try and figure out which versions of UNetbootin are working? I will start a new topic for this too.
I will now close this thread, so as to encourage people to start new topics for individual problems. Thank you again to everybody who has provided feedback. 