Sculpting with Blender 2.51. Allan writes -

Blender has had a sculpt mode for a while now, but with the recent release of the ground-up recode 2.5, a few minor tweaks have made it into a really powerful tool, especially for people looking to interact with their 3D in a more intuitive way than painstakingly dragging vertices around and fretting over topology. In this tutorial, we’ll start with Blender’s default cube and carve numbers into it! For this tutorial, you’ll need to go grab the latest release of Blender 2.5, which is still in alpha but stable enough to work with. It’s a well-behaved zip file– just dump it in a directory and run the executable.