I can't believe no one has started a Revett thread yet on here! Seriously, THEY have the BEST upside potential of any silver stock ; ) !
This article does a better job describing their complicated situation (hey, if it was simple they would already be fully valued!) than I ever could:
Check out these Resources!
Silver: 90Mozs Copper: 950 Million lbs
Silver: 229 Mozs Copper : 2.2 billion lbs
Important facts: New Montana legislation allows mine development work to continue while any cases are being argued in court.
The Forest Service has approved the Rock Creek mine, the judge however wanted some parts of their plan modified, you can read the rather lengthy decision on Revett's website.
Environmental FAQ's: http://www.revettminerals.com/documents/PUB%2010.06.05%20Revett-FAQ-Draft%20QA.pdf
One interesting fact: The last exploration of Rock Creek was over 20 years ago, because surface drilling has been banned in the park, and future drilling will be done horizontally from underground. However, because it was done so long ago when the price of silver had collapsed, they didn't exactly go all out with the drilling, thus some expect that once further exploration is commenced on this property the resource will easily top 300Mozs of silver, I think they have already exceeded the original estimates of the resources in the Troy deposit by many times, and it is all part of the same geological formation. DYODD!