User blog comment:Bronzey/Details of apparent next ME2 DLC pack - "Arrival"/@comment-1853169-20110222205929

A tad bit more info, not sure how authentic or reliable this is, it could amount to nothing but for those interested: http://www.destructoid.com/mass-effect-2-pc-files-hint-at-arrival-dlc-content-194762.phtml

Chris Priestly over at the Bioware forums has said that we can learn more on the achievements in the coming weeks, keep checking the ME website.