Saint's Row 2 Easter Egg - Ultor Develops Prototype Mining Equipment

After successfully clearing a mission on Saints Row 2, a newspaper headline, with what you just did on the front page, will be shown. After beating the mission Pyramid Scheme, you should see a headline saying something like, "The Pyramid Exposed!". If you look right below that on the left side, you will see that there is a subtitle to the headline. It says "Prototype Mining Equipment Discovered"

This is a reference to one of Volition's earlier games, Red Faction, in which you were rebelling against the powerful (and evil) mining corporation Ultor... on Mars. Volition decided to put Ultor in the game as a reference to the game in Saints Row 1 and brought them back to be the villain in Saints Row 2.
So the Ultor in Saints Row 1 and 2 must be the Ultor in Red Faction, in the past (they even have the same logo).