I've got the font mostly created to my satisfaction; if someone can suggest better-looking or clearer symbols, or more symbols that I should include, then please say so.
I've got some TeX macros that take care of special symbols (like that 5-with-a-hat on it), and that affect the global chart appearance.
The whole thing is bundled into a ZIP file, and I've put it up on a google site: http://sites.google.com/site/knittexlat
I think that at this point, I need to (a) revise the documentation, and (b) get some other people to look at it and tell me any other commands/symbols this package needs. So if you know TeX and are into charting knitting patterns, please, download and test it and tell me what you think. There are a few more elaborate things I want to do to the cables, but that can wait.