FasterPussyCat: First off, I don't even have my Mac yet, probably a little over 2 weeks away. I will be coming over from Ubuntu and have just kinda been browsing the forums here getting an idea of what I'm getting into (also just kinda anxiously awaiting getting my Mac).
Over in the Ubuntu forums one of my favorite sections to browse is the "Tutorials and Tips" area. Linux users are pretty tech savy as well by the way. In that section they might have a tutorial on running a full screen video game in a separate X-session so that you can minimize it while you check on other programs, or maybe how to tether your Iphone using free open source software, but you get the idea. Maybe its just an inherent difference between OS' that wouldn't make such a section desirable but I could see things like "Using Ichat for your MSN contacts" or "Optimizing your bit torrent client" as being useful here. I would think lots of people have little tips and instructions that many other folks may not know about.
Who knows though, maybe I'm wrong? Anyone else?