Google.com has released a useful add-in for Microsoft Word, which enables bloggers to use Microsoft Word as a blogging, editing and publishing tool. You don't even have to open up the browser. Check your system specifications whether this add-in is compatible with your system.( http://help.blogger.com/bin/answer.py?answer=1180 )
The add-in is free to download from here http://buzz.blogger.com/bloggerforword.html .
Note: This add-in does not work with newer layouts of blogger ( KnownIssues.blogspot.com ). There also seems to be an issue with MS Word2007 Blogger Feature.