A small web app to create PDF templates for sketching typefaces. Written in JavaScript. Uses jsPDF.
http://bencrowder.github.com/typlate/
You can set the y location of each guide using the textboxes. When you're happy with the proportions, click Download. The PDF will open in a new window (where you can print it or save it).
Safari and Firefox don't yet support the Canvas API for dashed lines, so the preview lines are solid there.
If you're using Chrome, change the type variable in template.downloadPDF to 'download' and then the Download button will actually download the file rather than opening it in a new window. (I had to patch jsPDF per this comment to get it to work, though.)