WordPress AutoLinker Plugin

I need a WordPress plugin to be coded, to allow bloggers to automatically insert links in their posts, by specifying keywords. Here is how it will work: 1. The blogger goes to the "Settings" page of the plugin, and insert a keyword he wants to link (for example: web hosting) with the URL that should be used (for example: [login to view URL]). 2. The plugin will search for all the posts and pages within the blog that have the keyword "web hosting", and it will create a link where with the URL specified You can see a similar plugin here: [login to view URL] I want the "Settings" page of the plugin to have the following fields: 1. A field to to specify the keyword 2. A field to specify the destination URL 3. A tickbox to "nofollow" the link if desired 4. A tickbox with the option to use a redirect -if the user wants to use a redirect, a field will become writable where he can choose the keyword of the redirect (for example [login to view URL] -if the user wants to use a redirect there should also be a tickbox asking if he wants to track clicks on the link Below these fields you should have a table displaying all the autolinks that have already been created, with options to "edit" or "delete" each. Suggestions to improve/change things are welcome.