During the summer I got half way through Noll & Nystrom's book Is the Reformation Over? An Evangelical Assessment of Contemporary Roman Catholicism. It makes for fascinating reading and I must pick it up again very soon. The aversion toward serious doctrinal thinking, the satisfaction with confessional minimalism, and the unpicking of the threads that connect contemporary Western evangelicalism to historic Protestant theology are considerable factors in the rapprochement between the big "E" tent and Rome.
Scott Clark has a very helpful post on this here. Carl Trueman had a very stimulating review here.