Could you make an option to the html5please call to offer Chrome Frame as an option?
For people who are working on bringing HTML5 to "internal" or "enterprise" apps, read IE678, they know their target audience and they know that they most likely do not have admin rights. This leaves Chrome Frame as the only option.
My opinion is that this should be opt-in, not default.
+1 for this being an opt-in.
Does anyone still have an interest in adding this?