LiveWriter Onscreen is a Live Writer add-on. Its not a plugin. It's more like a Live Writer powertoy. Thats what this blog is about.
-Snip screens and upload to Flickr (and then use them in your blog post)
-Creates new posts, opens existing posts, Blog local or web images
-blog your feeds (built in feed viewer lets you blog from your subscriptions)
The above feature list is not comprehensive. I just finished the first beta and am doing the help as i set up this blog.