At this point they've released Lights and Barricade as singles. Both are good, but I especially like Barricade. There are some other new songs that they're playing live now--Summer Well and Success. Summer Well is great--probably my favorite of the new songs I've heard.
I think every new Interpol record is going to be saddled with comparisons to TOBL. It's like how every KISS record is the new Destroyer. One way that it does return to the TOBL vibe, though, is that Carlos D's bass is up a little further in the mix and his parts are a little funkier than on OLTA.
I have to say, though, that I'm one of the few Interpol fans who think that OLTA is a great record. Pioneer to the Falls, Pace is the Trick, and Lighthouse are at least as good as the best stuff on TOBL, in my opinion.