Readers may already have seen many of these articles, but just to get them in one place, here are comments from several writers who regularly treat the topic of U2 from a theological perspective. I'm on record, below, as saying that I find Songs of Innocence to have a different kind of focus than much of U2's work; some of these folks note the same thing in one way or another, others don't agree and see the same set of Christian preoccupations here that we've had in other albums.
Greg Clarke, for example, reads the opening track as about Christian conversion and only tangentially related to Joey Ramone. Steve Harmon offers a typically thoughtful and subtle piece with some interesting comments on "Sleep Like A Baby Tonight." The folks at Mockingbird artfully take the album's delivery method as a metaphor for their laser focus, one-way love (grace). After that earlier Wordle, Mark Meynell looks to be planning on blogging on some individual songs; here's "Song for Someone," memorably called "opaquely specific."
There may be others I have missed. Do chime in in the comments if so.