Here's an article on the Late-2010 Mac Pro and iMac and what to expect.
Stop promoting your own blog by making fictitious articles.
I know you're just discussing this stuff but your blog has ads on it and this forum has strict rules against promoting sites that you gain from financially. SEO links are not allowed and certainly not threads that lie to people to get them to visit your site.
By all means copy/paste the content of your blog post inline and discuss what you think the next Mac Pro and iMac should have and why you think early October would be the release date but don't post like these are facts to get click-throughs.