I spend my time now in Minecraft writing books "written by Surak" in the Vulcan language, and building Vulcan temples. I am even creating the city of Shi'Kahr.
But my favorite building that I have created so far is my Vulcan Conference Hall:
I built an IDIC into the end wall using gold, iron, and emerald blocks. In order for it to be visible in the night, I then covered only the IDIC in torches. In this way, the IDIC is visible throughout the nearby city:
On the side wall I built in the Vulcan symbol for Kolinahr with clay blocks and, once again, covered the shape in torches so that it is visible at night:
The rest of this large structure is constructed from nether brick, and the roof is outlined with torches:
On the other two sides of the building are three sets of doors - around which are adornments in gold, iron, and emerald (matching the IDIC). Surrounding the building are often members of the delegation and ambassadors (actually "villagers").
The same is true from the inside of the building:
Here you can see the inside of the building, as the final wall was not completed at this time. The major reason I did not light up the symbol of Kolinahr on the inside of the building was that unlike the IDIC, the symbol does not read as anything when reversed: