A while back MSN stopped allowing users to find the backlinks to sites. A shame because they were much more accurate than Google and much faster at updating the backlinks than Yahoo. As far as I know you still can't find how many sites link to you from MSN.
For Yahoo, you type this into the search box:
link:yourdomain.com
For example I used one of my sites:
link:
Homeowner Mortgage Advice
Note: there is no space between the 'link:' and the domain name. For the domain you can type it with or without the
http://, it makes no difference. Although if you have backlinks under both www. and non-www versions you'll probably want to check both.
Yahoo is
much more accurate than Google, as you may already know.
A tool I just found out about today that might interest you if you use the FireFox browser is
SEOHand. They estimate things like backlinks and page rank for your site. I haven't had a chance to try it yet, would be interested in what you think if you give it a go.