Was just looking through some Patch 4.1 PTR notes on MMO Champion to confirm some ret pally changes I'd heard about, and saw this:

Bold Carnelian, Solid Zephyrite, Subtle Alicite, Perfect Quick Alicite, Sovereign Nightstone, Regal Jasper, Resolute Hessonite, and any cut of uncommon gem now sells to NPC for 75 silver instead of 9 gold.

That's... kind of a big deal. Not just because of how it affects jewelcrafting, but also because of its effect on ore prices, and therefore Blacksmithing and to a lesser extent Engineering. Not to mention a possible effect on the Enchanting market.

Flux at Power Word: Gold has a post and link round-up.