A few talks you might consider watching online:

Today (now yesterday, actually)'s colloquium.  Patrick Brady gives a nice accessible introduction to gravity waves and the current LIGO observation program, as well as what we may see when Advanced LIGO comes on line in a few years.  Some enlightening animations.  Recommended for: General Audiences. Mild equations.

Very cool ideas, very well presented, from Stephen Bartlett yesterday in the PIQuDos (Perimeter Institute Quantum Discussions series) on how the ability to do quantum computational gates---in this case, single qubit gates---in a measurement-based quantum computational model using the ground state of a lattice Hamiltonian as a resource---can in some cases be modeled by an order parameter, the expectation value of a "string" of operators on adjacent lattice sites that are related to the measurements you need to do to effect the gate.  Phases---regions of parameter space in the parametrized family of Hamiltonians---exist for which the order parameter indicates these gates work well for measurement-based QC purposes.  In particular, the qubit has to be "moved" through the lattice as a "circuit" is simulated, and in a "good" phase, the fidelity of the state of the moved qubit to the state before it's moved, is independent of how far it has to be moved.   An excellent talk.  Recommended for: quantum computation wonks, condensed matter physicists, and a general physics audience interested in getting an idea of the cutting edge of interaction between quantum information/computation and condensed matter physics.  If you're looking for interesting but possibly hard open problems, this talk certainly suggests some.