The extensions pages are now cached to avoid server overload in the future. The pages should be automatically updated daily, so this will certainly not make the listing outdated. The difference is just that PHP will not be used everytime someone wants to access the extensions on the site. The same will probably be done with the themes pages soon.
If you're interested in where Mozilla.org is going and what's planned for Mozilla 2.0, be sure to read Mozilla.org driver Brendan Eich's newly created roadmap blog hosted by MozillaZine. Brendan recently posted a message about this in the n.p.m.seamonkey and the first blog entry could appear tomorrow already.
Line 28 really shows the brilliance of Microsoft.:
