OK here's what I added lately:
-- Choose which style to use for colors/fonts
-- Additional content boxes:
-- -- Use up to 3 areas
-- -- Provide both an HTML formatted and a plain text version of each item for use in each format of newsletter
-- Different subject per email format
-- *All* HTML is in templates

(I'm so proud of this one)
I'm beta testing it now and am looking at a release probably by next weekend. If you want other features, now's the time to speak up!
Oh BTW, to make it easy to come over from Christec's version, I am using the same field names in the user table. Does anyone want to see an announcement/news-type thread(s) inclusion like he has, where it puts in up to like 400 characters of the post?