Quick on the heels of my first WordPress plugin, Add Logo to Admin, comes a way more complicated plugin that took me quite a while to figure out. Once I actually get some sleep and take a look over it again I will probably put up some tidbits on how to make something like this actually work.
What does it actually do?
It takes the values from a custom field and turns them into searchable links.
What is a searchable link?
A link that activates a search on your site and searched for the text in the link. Kind of like a tag but not a tag.
NOTE: I only tested this on WordPress 2.7.