Looking at taxonomy tagging tools for a new site.

Working on a blog site would like to use a free tagging with it.

Thought I'd ask for some referrals from others on a good choice.

Not sure if I 'd like a autotag creator from the blog contents or a text highlight clickon, or something easy like that.

It is astounding how much stuff can get into your tags from users not paying attention.

I would almost prefer to just let user highlight text and make no manual entries into the tag entry.

This way nothing would get into the tag entry, except the highlighted word and the comma separator.

Also, tags would have to come from content of blog of course.

That may not be the best way to tag, since the actual tag words would have to be in the content of the blog item.

I realize there are synomyms and things that could be more significant to searching in many cases.

Reviewing the taxonomy modules I'm not quite sure what does what.

So, I'd appreciate reading some thoughts and ideas from other users.

Thanks