Hi, Dave -
Hmmm. I think this plugin has great potential. The ability to "update your site via email" sounds fantastic. However, right now I feel disinclined to promote it to my clients because I'd have to explain it only works with certain provisos.
Ultimately, if it's going to perform as I assumed it would, you need to strip out everything apart from what's inside the <body> tag.
Indeed, you may need to go even further. Would it be possible to strip out everything that isn't either a <p>, <a>, <img>, <ul> or <li> tag?
:0/
Perchpole