[MrEdd]

We have had room temperature superconductors since April 22 1995, just a few days after the OKC Bombing (which may have hidden it from your radar. During the war in the former Yugoslavia Clintoon shut down the Yugoslav power grids with superconductor shard bombs.

If congress were really serious about ending foreign fuel dependence, replacing the backbone of the power grid would be at the top of the list.

[Post Toasties]

Here's what Wikipedia has regarding high temperature superconductors:

Feb 1987 YBCO discovered to have Tc of 90 K by Paul Chu et al.

1988 BSCCO discovered with Tc up to 107 K, and TBCCO (T=thallium) discovered to have Tc of 125 K.

As of 2006, the highest-temperature superconductor (at ambient pressure) is mercury thallium barium calcium copper oxide (Hg12Tl3Ba30Ca30Cu45O125), at 138 K[4] 138 K, is held by a cuprate-perovskite material,[5] , possibly 164 K under high pressure[6].

March 2008 Tc of about 185 K claimed for (Sn1.0Pb0.5In0.5) Ba4Tm5Cu7O20+ [7]

The freezing point of water is 273 K. High temperature superconductors are also limited in how strong a magnetic field they can be immersed in before they lose their superconductivity.

[ConservativeMind]

The bombs used in Yugoslavia were called “graphite bombs,” which had nothing to do with “superconductors.” In fact, they were simply conducting filaments that shorted the electricity.

http://en.wikipedia.org/wiki/Graphite_bomb