Here is what I did.
1) In Typepad I added my Twitter account
2) I could now publish my posts to twitter, but it was an extra step to go to TypePad posts to enable a twitter feed. I use Windows Live Writer to write blog entries, and there is a twitter notify plug-in.
3) You can check to see if the twitter plug-in installed in the Windows Live Writer edit blog settings.
4) When you publish a dialog box comes to confirm the publishing to Twitter. Here is the dialog from this post.
Overall easier than I anticipated and it is just one more dialog box now that I have Windows Live Writer configured.
You can read my tweets at www.twitter.com/greenm3 which are an alternative to subscribing to my RSS feeds.