Sola Scriptura is the name of a Reformed Baptist Blog organised by Micheal Haykin, Fred Zaspel and others. I have been invited to contribute and the first of these can be found here. You will find the other articles interesting and stimualiting too, I'm sure.
Bonhoeffer uses a similar phrase 'worldly Christianity'. It's J Gresham Machen that I want to line up most closely with. See his Christianity and culture here. Having done commentaries on Proverbs (Heavenly Wisdom) and Song of Songs (Heavenly Love), a matching title for Ecclesiastes would be Heavenly Worldliness. For my stance on worldliness, see 3 posts here.