Does Lego make the bricks with a stone, brick or concrete block finish on the sides? I would like to use these for walls and buildings on a train layout. Thanks!
As usual with LEGO, the best solution is often to make your own.
You can make quite impressive brick walls using tiles, like this (image from Brickshelf):
There is a tutorial for something similar here.
A range of other techniques can be found in an article called Avoiding the "Big Gray Wall" Syndrome at Classic-Castle.com. In fact, Google LEGO castles for a great source of inspiration for stonework of all kinds. For example, check this and this out.
There's this part, which has a brick pattern molded into the side:
In short: Yes.
There are actually quite a lot varying in base colour and stone/brick design. As mentioned by another poster, many are from the castle theme, but there are also interesting ones from Duplo which may help with your layout if you are trying to cover a large area as the Duplo blocks are larger.
Some examples are below, but for lots more take a look through these items on Bricklink.
I'm pretty sure some of the Castle series have tall pieces with some brick outlines...