Yeah, if your glass is coming out a solid colored then it's most likely the raytrace settings, its in the render settings' quality tab. Bump up the refraction traces, 2 for starters but just make sure the max trace depth is the sum of the reflection and refraction traces because it needs to be able to cover both. Also, I find its not a good idea to make glass 100 % transparent because then it doesn't even seem tangible you know, I try not to go above 95% transparency, balance the difference out in the diffuse(5%), bah I'm rambling, anyways I think you should look into linear lighting, once you absorb it, you'll never look back.


As for the textures, I think they're 1/3 of the issue (what res are they anyway? They seem a bit blurred). I think its the wood shader that's flattening your objects, its very matte, even a bit ambiguous. Did you pump out a specular map and a bump map? I think those will help a lot.