Quantized space-time and redshift.

[Nereid]

Here's a link to an article about a bright young Greek Physicist working in Canada. There are still experiments in the works that might probe the fine structure of spacetime...GLAST (scheduled for 2006) may be able to detect whether gamma rays of very short wavelength can be slowed by interference with space-time at very small scales.

http://www.greece.gr/GLOBAL_GREECE/SPOTLIGHT/thinkingatthespeedoflight.stm?content_ID=16

One piece of good news - for some of us! - is that the only likely accessible* regime where LQG, String/M Theory, whatever, may be tested (in the next century or three) is high energy astrophysics (and gravity wave detectors) - GLAST, AMANDA, the various cosmic ray observatories (including the gamma ones); LISA, LIGO, ... If history is any guide, anyone of these will quite likely turn up quite unanticipated phenomena (and maybe also constrain some 'unified physics' out of the ballpark), showing yet again that the universe is richer, more complex, more wonderful than we puny Homo sap. mammals can even imagine.

*some possible 'local' ones: investigations into short-range deviations from inverse square for gravity, something unexpected from the LHC, even a 'routine' two-more-decimal-points study of something already 'well known'