Nice lecture by Steven Weinberg "Where Do We Stand? This is the 2004 KITP Future of Physics Symposium. I highly reccomend Weinberg's lecture. You may also want to listen to Leonard Susskind, who promises not to mention the Anthropic Principle in his talk, then flogs it mercilessly. As much as I disagree with his favorite slant, he's got a great sense of humor, and the talk is quite entertaining. http://online.itp.ucsb.edu/online/kitp25/ I'd also like to highly recommend Michael Turner's lecture on "The Physics of the Dark Sector"