I recently installed a plugin for firefox and wanted to see what sort of post it would generate, this is the result.
You can find firefox plugins on the firefox website, this is called “preformancing” and seems quite a good both wysiwyg and html editor, with a nice preview window, it has a few nice features for other sorts of bloggers, allowing remote posting from other websites, and including content, and also supports other sorts of websites such as del.ici.ous