Aweber, a mailing list service that costs money, has added Twitter support. This means that you can send a tweet automatically, when a new email is being delivered to the mailing list. Darren Rowse, an Aweber users, has screenshots.
Thord Daniel Hedengren is a designer, writer, and blogger, and also the former editor of The Blog Herald. He used to be a hotshot in the gaming industry in Sweden, but sold everything and went International. Most recently he wrote a book called Smashing WordPress: Beyond the Blog, and does loads of kickass design.