The Dec 2012 issue of JSNT is online and has some very interesting articles including one by Paul Foster where he calls for a re-evaluation of the scholarly tendency to treat 2 Thessalonians as pseudonymous. Essentially, Foster says, due to developments in research, the very outdated arguments for why 2 Thess was not written by Paul are no longer convincing. I think Foster is right about this, and this also applies (I would argue) to Colossians.