I must say that drupal.org is good generally. It provides most of the information necessary to get one started with the CMS in an easily accessible fashion, but I think there are certain interface changes which might be made.
1. Make it obvious what the red Asterisk means in every context. It seems to denote "necessary field" generally, but that does not make sense in the context of http://drupal.org/project/releases. (Primarily because it says "The contributed modules are not part of any official release and might not work properly" which precludes the asterisked modules from being "default" )
2. In the case of subscriptions module it should be noted what sort of notifications are possible, (e.g. control panel style, e-mail) and whether this can be set as default. This is partialy because subscriptions are an intensely important (basic even!) part of any truly useful forum system. I personally have great trouble remembering where I posted what (unless I specifically create bookmarks, and that is not feasible beyond a certain point.) This problem is excerbated by the fact that unlike other modules, "subscriotions" does not have any online documentation.
3. Given that one of the principles of drupal is xhtml/css compliance, ( http://drupal.org/node/10250 ) it should be stated at least somewhere that drupal is not xhtml/css compliant yet. Or it actually might be. I haven't been able to find that information. My assertion is based on the fact that while drupal.org claims to be xhtml 1.0 strict, it is not. http://validator.w3.org/check?uri=www.drupal.org This seems relatively minor; wbr simply has to be defined, but the problems seem systemic; use the validator on http://drupal.org/project/releases.