You listened to Winnifrith's new weekly podcast yet? Sounds like it was recorded in a sewage interceptor tunnel or an aircraft hangar.

I started listening, but stopped  since he was not covering anything I was interested in, and went on a bit

Useful innovation as it's free!

Incidentally, if you're looking for something completely wild eyed and left field, take a look at Vast Resources. Things should be hotting up there imminently