The OPML Editor is an outliner, an editor that works with chunks of text that slide around on rails. You can control the level of detail you look at, and reorganize according to structure. It's great for writing blog posts, technical notes, program code, legal briefs, product plans, to-do lists, entire websites, anything where ideas need organization.
That returns the OPML Subscription List for the Twitter user named cluelessnewbie. This person subscribes to the top 100 most-followed people on Twitter (that's what makes him so clueless).