@User: I'd use xcircuit, but people seem to either love it or hate it, and I would not force it upon those who don't like it. It's one of a handful of schematic editors that have a small but consistent following. KiCAD, on the other hand, appears to have a large and growing user base. The main idea at the moment is to adopt KiCAD for the schematic and symbol library file formats, and provide scripts to convert to other schematic editing tools (xcircuit, electric, gschem, sue, ...) (also to/from EDIF, which hopefully will provide support for commercial tools).