The two devotionals I wrote to go with Paul: Solider of Peace are now out and available at Amazon:
I've mentioned before that the great thing about these is that they work like a layperson's commentary. Each day's devotional is only about 500 words and includes summary, info you may never have heard, and application. They're ideal for lay Bible studies, but I think they would also be great for sermon preparation in a series through Romans--lots of ideas you could jump off from.
I wish I could send the book these go with to every pastor, DS, and general official in the denomination, since my sense is that very few Wesleyans know much about what biblical experts have to say about Romans, let alone a Wesleyan perspective on such recent scholarship. While I am no slavish follower of the "new perspective," there are a lot of obvious and probable corrections to old views that pastors of all stripes should know.