When you use Microsoft Word to post to a SharePoint blog, you can create your blog post just as easily you would any other document. You can quickly check your spelling, add hyperlinks, add pictures and tables, format the text, and then upload your blog post to your site, without ever leaving Word.

 Note    To post to a SharePoint blog, you must have permission to contribute to the Posts list on the blog site.


http://office.microsoft.com/en-us/sharepoint-foundation-help/video-use-word-2010-to-post-to-a-sharepoint-blog-VA101790488.aspx