My question is simple. Are tagging blog post important? When I say important it has two areas: Is it important for users using the website.Is it important for SEO?For instance let's say I write a blog post about how amazing of a browser Internet Explorer 8 is...I might use tags such as Internet Explorer IE8 etc.Do these really have any impact on my site? 
Blog Tagging - Is it important?
seo;blog;tags
I came across the direct answer to this from Matt Cutts in a Google Webmaster Video.He basically says tagging isn't really worth it because Google is smart enough to see the keywords in the blog article. He went on to say that he doesn't use tags for his blog.With that said he did recommend adding categories instead of tags. This would allow the user to easily filter the various categories on the site and allow them to find what they are looking for. For more info watch the video