I commented yesterday that after the marathon upgrade networking wasn't enabled after a re-boot. Turns out I was wrong about that. It's actually working, it's that the network applet icon incorrectly shows state and when you hover the mouse over the icon it says "No network connection". But if you right click on the icon and then select connection information from the menu you discover that it is fully connected. I tested that connection out by firing up NetBeans and seeing that the welcome screen goes out and gathers articles and news to display. And of course it did. I then fired up Firefox and wrote up this entry. And of course the network applet still shows my network connection disabled.
When 7.04 is finally and officially released I'll do a complete re-install and see if any of these issues (network and Compiz) clear up. We are, after all, still in development mode. And part of the final testing should be a new installation just to make sure the old bad testing bits are truly flushed out.