Right now, clicking on the Downloads tab at the top, you are put in:

maemo.org > Downloads > OS 2008

Should this be changed to Maemo 5 as a default?

Also, could/should the various OS flavors on the right be grouped under an "Operating Systems" header to make them more obvious to casual users?

Lastly, would it make sense to add in introductory paragraph below the bread crumbs and above the downloads themselves? Something like:

The Maemo Operating System has gone through a number of versions and some downloads are version specific. The N900 uses Maemo 5. The N810 and the updated N800 use OS2008. Older devices may still use OS2006 and OS2007.