For all those of you that are on the bleeding edge of technology or even just early adopters. Here's the full website, every article, every link, everything available in OPML format!
So if you subscribe to the top outline, you'll see how everything is linked together, how the content flows and extras such as links in separate sub-taxonomies. Each page also has its own OPML file, so you can start drilling from there.
So why all the hassle? Just finger-practice? Punk'd?
I believe it is a great addition in terms of accessibility as it provides another perspective on the content, way beyond the XHTML + CSS way of dealing with markup. Not a replacement for our trio XHTML + CSS + RSS but rather a 4th one that interacts with the XHTML + RSS part of it since the OPML can parse RSS feeds and display them right inside the outline structure.
When coding HTML correctly you already have a hierarchic representation of your content as (x)HTML is very feature-rich as we learned in the past. SO where's the point in doing it in OPML? Think content! The ability to expand and collapse whole context structures is just amazing when you want to skim down content to find something quickly.
Database Search vs. OPML
There's no searching of OPML content yet, you have to do it by hand, this way you remember stuff that you pass on the way and know where to find it faster next time. But there's an even greater thing up here... Subscriptions! Just like you subscribe to RSS feeds already, you can subscribe to ideas now and watch as they form. In the RSS paradigm we have finite items that correspond to articles. With OPML every object is marked with a date and pops-up and expands its children whenever one idea is updated.
Think of a world directory that everybody links to and gets linked back, this creates one file of not too large size (since it just stores links) that contains every aspect of the world in an open fashion. It takes the idea of the web to the next step. Too bad that OMNI Group doesn't want to participate, shoot them an e-mail and grill them some more, might help them to see the light.
I do know that from an XML perspective the OPML format is questionable, but as with everything in tech, there will be a version 2.