I actually don't think it's such a big deal that organizations edit their own wikipedia entries, but it is kind of hilarious and instructive. The Democratic Leadership Council has of course been doing it, and you can see a partial list of their edits here.
The DLC has both supported and criticized the policies of President [[George W. Bush]].
The DLC often criticized the policies of President [[George W. Bush]], but much of the criticism is seen as measured and nuanced.
Other edits include change removing comparisons of New Democrats and Grover Cleveland, and an edit of modifying Will Marshall's background from someone who has impressive right-wing credentials to someone who has been accused of having right-wing credentials.
Someone over there also has a bit of an obsession with British tennis player Tim Henman.