The Blog Ecosystem is great for keeping track of many of the blogs that link to yours. While perhaps not as extensive as Technorati
, The Blog Ecosystem is still very good.
Be sure to add your own blog manually to the Ecosystem, under Add Your Weblog
The Ecosystem's spiders don't pick up every link, all of the time. The only way to be entirely certain that your blog is included, is to do it yourself.
I use the code that is available to keep track of your blog's progress up the ecological ladder. It's kind of fun to note any changes in your link ecological status.