Just for everybody as blind as me: You have to click on '(Sourceforge.net)' on the download page to get to the actual download... You have to actually change the standard blogger theme to hide links that well. At least the buy options aren't that hidden
I'm not going to do it btw, since it looks like nothing special from the screenshots. Guess it's all about having a blue boing ball and that 'OS4' isn't copyrighted to give some bland Linux distro a bit of a 'special touch'. Just my 2 cent