Hi!
Just to let you know - when I have tried to download (via Dashboard) com_ files for Joomla 3.0 - the link directed to 2.5 version only. I had to manually change the link structure to get 3.0 version. Maybe you are unaware of this so I decided to let you know about this issue.
Lukas
PS: this is my first ticket here - maybe not appropriate fot this kind of issues?