It's not model railroad related, but this is pretty cool news - the Illinois Railroad Museum is hoping to install solar power, thus powering it's traction railroad w/ solar. If this is completed, it'll have solar power plus operating steam (assuming 1630 is finally ready, which is the plan) next year, and a great showcase for both for school groups, etc.
http://www2.irm.org/blogs/archives/1450-IRM-TO-BUILD-SOLAR-FARM,-with-your-help.html