The preeminent Heidegger scholar in the US (and perhaps in the English language), is Hubert Dreyfus at the University of Berkeley. Daniel did a post for the Husserl podcast linking to a series of videos of him being interviewed by Bryan McGee here. In that series he actually talks more about Heidegger, so it's worth revisiting for the Heidegger episode as well.
Dreyfus has written a fair amount about Heidegger, but he recently did a seminar at Berkeley on Being and Time that got recorded and turned into a podcast series. It's from the Fall of 2007, so pretty recent and it's a very disciplined approach to the text. Dreyfus is a terrifically engaging teacher and is able to speak 'right down to earth in a language that everyone here can easily understand'. Mark mentioned that Dreyfus has also written on cognitive science and philosophy of mind and he brings that kind of sensibility to the text, while maintaining respect for the project and its insights. You can find the recordings here:
You'd have to have a lot of time and really be committed to listen to the whole series of lectures. If you just want to get the flavor, he does a great job of laying out the project of the book and many of the key insights in the first four lectures: Being, Dasein and Being-in-the-World I & II. [You can skip the first 30 minutes of the first one while they talk about the syllabus and course scheduling, etc.] I took notes on the first two that I'm happy to share with anyone who is interested.