Wow, if I hadn't seen a @snook repost via @fireawaymarmot I might have missed this post and the helpful description. When I first loaded up the coffesource.net site I couldn't tell what it was for, so I moved on thinking it was an as-of-yet unworking work-in-progress.

The tag filtering is awesome. Though you might consider pre-populating it with a set of tags that the current search set contains.

Edit: Also, I find it really useful that the result is markdown text. I'm going to use this to start posting links to my previous content when I make new posts.