Hei... I thing not much explained just delete this code if you not want show your post id or the name of author... LOL
<span class='post-author'>
<b:if cond='data:top.showAuthor'>
<data:top.authorLabel/> <data:post.author/>
</b:if>
</span>
<b:if cond='data:top.showAuthor'>
<data:top.authorLabel/> <data:post.author/>
</b:if>
</span>
