Also, if you have a spell check program, use it. That's what it's there for. Not everyone can read or see your email if you put it in HTML format. An example of this is the new stationery that Hotmail has. We all want to be exciting and different, but it seems as if email isn't quite the place yet.
Same thing goes with attachments.
It might be cool to pass on a sound clip, or a video clip, but here again, what you send to the list goes out to 700-some people. Some of whom have to download their email. Some of these people might not be happy to see an attachment in their email. If you have something you want to share, ask people to email you and then privately email it to them. But don't send it to the list.