Setup your site with Google Webmaster tools. That will give you an accurate count of backlinks that Google sees.
Not sure if this is what you are looking for, but the advanced search for google at http://www.google.com/advanced_search?hl=en allows you to "Find pages that link to the page ". You can put in a URL of your specific pages and google will show you all the search results Just did it for my site and found that 375 are linking to me.
Server was down Need a login to access Not very useful. You can also go to http://siteexplorer.search.yahoo.com and submit an url to find out how many backlinks Yahoo sees for a site.
Google: link:yoursite.com boom, there are all the backlinks that google sees. The other search engines have similar requests too.
Not all. In fact, less than one-tenth. You will need to sign up for a Google Webmaster Tools account to see all the links Google sees pointing towards your site. Be warned the stats aren't live stats and only update periodically based on the popularity of your site.
Install Google tool bar and go to the page rank in their back link checker option is their you can check your site back link their also.
go to yahoo yahoo linkdomain:yoursite.org for more info and help w/ your seo go to MY SITE: http://www.angle45media.wordpress.com
xinureturns.com offers a wealth of data including backlinks. It's always fun to check wholinkstome.com