I had problems using “Twit-ee” module for ExpressionEngine so I went hunting for solutions. This error kept coming up: “Oh dear – Twitter says your request is invalid … (Error 400)”. Adjusting cache settings didn’t help.
But using Twitter’s own embed code worked well. I moved their .js file local and was able to tweak the output code easily from there and add my own classes.
UPDATE: Twitter’s own code will not display a “retweet”. so if you only want to display 1 tweet and your most recent is a retweet you get nothing. An unexpected error that they may not be aware of.
And there’s a method using google’s code.
Another great resource that includes my favorite – Twitter Tools for WordPress:
Here are 10 of the most useful ways to start turning your site readers (or your client’s customer base) into Twitter followers, and vice versa.
via 10 Awesome Ways to Integrate Twitter With Your Website – Nettuts