BioWare has released the Equalizer Pack downloadable content for Mass Effect 2.
Inside you'll find an Archon Visor, Capacitor Helmet and the Inferno Armor. The set costs 160 Microsoft/BioWare Points (Ł1.40/€1.90).
The Archon Visor reduces the time it takes Shepard to recharge his powers; The Capacitor Helmet boost shield recovery; and the Inferno Armor increases Shepard's movement speed and increases tech and biotic damage. The latter even offers a teensy boost to negotiations.
You can find the content on the Xbox.com website.