Ahem

"Gearbox’s Steve Gibson made an official announcement to Destructoid and stated that Borderlands would be released for download on Steam. Gibson also mentioned that the desktop release would include several features that will definitely not be seen on home console versions. Weapons can be exported via item cards in .jpg format, so if players collect a weapon of mass awesomeness that no one in their circle of friends has, they’ll be able to share it with them. In addition to that interesting feature, Borderlands for the PC will come with special menu and inventory systems designed exclusively around the mouse input option. Another little extra is the addition of timedemo benchmark software, which is exclusive to the PC. Last, but certainly not least, if played on a high-end system, the PC version of Borderlands will show off the most impressive graphics of all three versions of the game"