A So-So Debut For Microsoft's Blog Service Microsoft made a belated entrance into the "blogosphere" Thursday, unveiling a free Web-log publishing service one day after Merriam-Webster proclaimed "blog" the word of the year.&lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2" color="#666666"&gt;&lt;B&gt;-Leslie Walker&lt;/b&gt;&lt;/font&gt;