Alex Singleton has some thoughts for the "no html email" crowd:

In the early days of the web, there was a debate between geeks about what the web should look like. There were some people, the "ultra-geeks", who thought that websites should be about content and that it was wrong for webmasters to "force" readers to view the content in a particular way. Instead, the fonts and sizes used should be set by the visitor in their own web browser. Fortunately, everyone ignored the ultra-geeks, and the "DTP geeks" won (the geeks who thought that web pages should look like they've been desktop published).

Just as progress has been good for word processing and web pages, progress is good for e-mail. Geeks will give you a long list of charges against HTML e-mail. Ignore them, go into the Preferences window of your e-mail program, and tell it to compose HTML e-mail.

I'm sure I'll get complaints from the holdouts who use things like Pine. The rest of us have moved on.