E-learning design framework/style guide
Style Guide for Online Courses
Creating teaching materials that are going to be delivered via the internet and viewed using a browser imposes different needs than traditional print-based materials. Best-practise
Fonts: Use a sans serif font such as Arial, Helvetica or Trebuchet at a minimum size of 12pt.
(: Hi Trevor --- there is a WE workgroup that is starting to work on generic guidelines which you may want to join. Would be great to collaborate on this initiative as a WE-wide project :-) )