buckworks - 9:57 am on Aug 18, 2011 (gmt 0)
An editorial link from a dedicated article on a strong .gov site ... that is likely to be an excellent link, for several reasons. Well done! :)
It's normal and no cause for worry if a new article page appears to have no PR. The PR visible on the toolbar is often weeks or even months out of step with the "real" PR.
Yes, when someone links to one of your pages there will be spillover benefits for the rest of your site. As long as Google can follow the links, PR will flow. Maybe a little, maybe a lot, depending on the strength of the page that's linking to you. Where the PR flows (and traffic, too) will depend on your own internal link structure.