I heard about this at the March Meeting, and now it looks like things are picking up steam. There are a number of papers that have started appearing on the arxiv (1, 2, 3, 4, 5, 6, 7 update 8, 9, 10) about a new high temperature superconductor based on the parent compound LaOFeAs. This material has FeAs planes rather reminiscent of the CuO planes in the copper oxide superconductors. It's quite unusual to have an iron-based superconductor, since ferromagnetic correlations are usually associated with killing ordinary superconductivity. More exciting is the fact that this is not directly related to the cuprates and when doped with electrons (by replacing some of the oxygen with fluorine) it has a clear superconducting transition at 28 K. There are indications already that this is an unconventional superconductor, and third-hand rumors suggest that higher Tc values are on the way. It'll be interesting to see where this leads!