Groklaw has a good summary and explanation of the legal wranglings going on in Apple v. Samsung. It’s a fairly long post; it ranges from using trial briefs to understand each side’s major points to what trade dress really means; the later parts are tinged a bit by the author’s incredulity at the no-holds-barred-style technical maneuvers from both sides’ lawyers, but those maneuvers are pretty much what you’d expect when millions and billions of dollars are at stake. The first part of the blog post is worth reading, though, if you’re at all interested in how Apple and Samsung are presenting their cases.