Truetype Tracer has been accumulating features for a while. It now generates biarc polylines in dxf mode, and splines/nurbs in gcode mode. This means it requires LinuxCNC's Enhanced Machine Controller version 2.4.1 or newer.
Also included is the much-requested ability to fill in the letters. This is controlled with the -l flag. The default is to not fill, like previously.
Attached here is source for Truetype Tracer 4.0 and a ready-built deb package for Ubuntu 10.04 Lucid Lynx.
Files attached to this page: