I've used Yahoo Site Explorer and also Backlink Checker to check my blog's backlinks. I've noticed that very few of my internal links appear in these reports. Is that normal, or shouldn't all of them appear?

Also, in Backlink Checker, I see that some of my backlinks are "do not follow". Why would some bloggers choose to not follow the links from people who comment on their site? Wouldn't they want others to follow the comments they post?

And how do I check my site to see if it is set to "do follow" or "do not follow"? Thanks.

Rich