I've seen a lot of screenshots which look Anti-aliased. How can I pull this off myself?
DOF screenshots can help simulate the Anti-Aliased effect.
However; if you have a decent GPU, you actually can run Blockland with Anti-Aliasing. To do this, you would right click on the driver for your GPU (Catalyst Control Center, Nvidia Control Panel, ect.) and enable Anti-Aliasing in the 3D options.