kev - mind is made up. One site is fully indexed, one isn't. Re-read my posts. I am wondering if its to do with Inktomi and paid search inclusion, which was about 8 years ago. Just read a forum where people were banned and still not back in after all this time.
This is strange, but I've seen behavior like it before. I was running a social networking site full of blog URL's, forum topics, you name it. PR4, pretty good standing in other SE' like Google, but only the home page and about pages were indexed in Yahoo - absolutely nothing else! It's really weird how they work, I would suggest submitting to their sitemap section and giving it a few days, they'll catch up
I suggest you to submit you sitemap as well as few answers in yahoo answer with your url.. Thanks "FrqHuss"
The site currently doesn't have a sitemap. Any recommendations on how to create one? Just create a standard html page and manually add the links? Or use a tool?
Does the site have an RSS feed? If so, you can submit that to your yahoo site explorer instead of a regular sitemap. In my yahoo site explorer account, I submitted a sitemap and an RSS feed for all of my sites. That way, if yahoo can not access one or the other, the other one still provides some kind of information.