I installed Alex King's Twitter Tools 1.0b3 recently to display my latest tweets in the sidebar.
It worked really well until I set "Create a tweet when you post in your blog" to Yes. After that my new tweets stopped coming in. So I set that option back to No. And a couple of new tweets came in.
But today, the new tweets are not coming in again. I've tried deactivating and activating the plugin, toggling that "Create a tweet when you post in your blog" option on and off, but to no avail.
My Twitter account (http://twitter.com/sparklette) is working fine.
You can see my site at http://sparklette.net/