Tim Gombis has been writing some great posts on Romans. Highly recommended. Here they are.
What sort of text is Romans?
Paul's 'Gospel' ministry in Romans
Paul's ministry of mutuality
Paul's apostleship and God's mission
Paul's confidence in the gospel
Paul, Habakkuk and faithful improvisation
No one has an inside track with God
Justification and the unity of God's people
Faithful readings of the law foster unity
God's universal sovereignty and church unity
Ephesians, not Romans, represents Paul's theology
Body language in Romans, Part 1
Body language in Romans, Part 2
Body language in Romans, Part 3
Paul sends Abraham to Rome
Justifying the "ungodly"