What is the authority for Christians in matters of faith and morals? Does Sola Scriptura hold up to scrutiny? How about the view that Scripture must be wedded to tradition?

A popular Southern Baptist commenter on Shameless Popery and I (EO Catechumen) just had a discussion on Sola Scriptura. Honestly, I think if it was a debate, the Protestant side won. I’d be interested on your insight on the questions raised (if you are interested of course).