Oh well. I've noticed it's fallen into more Junk folders than the plain text emails I used to send out about 3 times a year, and consequently hasn't driven the same traffic burst to the site as the plain text emails.
Any suggestions? Things you would like to see in a monthly newsletter? For now (at least) I would like to focus on stuff that can be automatically generated by the site, as opposed to the extra resources it would take to write articles specifically for the newsletter.
I solved your problems with a good ASP enewsletter manager: www.mailupnet.com , which I think it's better than similar services (ConstantContact, Vertical Response...) because it's very flexible and I pay a monthly flat fee, regardless of how many emails I send, or how many contacts I have in my DB.