Is paying for a listing in the Yahoo directory going to have a worthwhile effect on PR and rankings ?
According to me , it's not worth as how much they are charging for listing (review). It will obviously increase your pagerank but if you can get user traffic from yahoo directory then only it's worth. Dont submit it only for seo purpose.
Yes definitely. Submission to yahoo directory is worth $300 i guess and let me tall you that i personally have two of my sites listed in there and they are really giving me good results. You can also opt for gathering link partners and sites related to your website. I think, having 4-5 links like these will surely be better than spending that much amount in the Yahoo dir.
I think you can get similar quality links for free. Maybe they aren't quite as good, but $300 is a lot of dough for any directory.