Since Zorian had the foresight to make a map of Undermountain as the party went along, I thought it was high time you all had a peek at it (million brownie points by the way Z!).  I will update this map for you on Zorians behalf so you can keep track of the groups progress and help identify areas you have yet to explore.  When I get a bit more time I'll add a map key and some notes about what you found and where but it should be fairly self explanetory from now on.

This is the parties current map and shows all the areas you have seen & mapped so far.  Areas marked in orange are where you have had previous encounters with the Caryatid column (topmost orange room), Ghouls (strangely shaped orange room near the middle), Orcs (the small yellow room) and the 'floating bones' (the easternmost orange room. -another party of Orcs appeared from the left and is moving north toward that area behind you now).

Although you only caught a glimse of it, the yellow room with the statue (star) icon is where you chased the goblin and found a swarm of giant ants filling the room and crawling over the statue.

Clearly you have only scratched the surface and there are a great many untraveled paths for you to choose from...

Zorians Map

                         

The Drow Temple
                                     
This is a close up view of the area you are currently in.  The large orange chamber is the Drow Temple.  The slightly orangy corridor to the left that ends in an S (the secret door Laerwen & Alec found) contains the masonry face carving that has red gems in place of eyes.