Two fun, free tools for blog/Twitter syndication combo:

1) : enter any Blog Rss feed url and twitterfeed will automatically post your blog entries to your twitter account

2) tweet.js : light, fast jQuery powered Twitter feed display - easy to configure options and show your Twitter posts on any page you choose

See both in action in the sidebar, here:

Anything I post on this blog gets added to my 'gowestweb' twitter feed, which is shown on the GoWest site using tweet.js