[development] HTML emails

[Allie Micka]

> That said, there may well be advantages to switching to  
> drupal_render() for email messages.

+1

Also, I think it's more than appropriate to keep HTML-formatting and  
Mime machinations out of core.  However, Drupal can't go around  
assuming that messages *won't* be HTML until it's ready to send them  
out, and then do its html-to-text conversion then.

Thanks!

Allie Micka
Advantage Labs, Inc.