That's the advantage of the sort of analysis in this article, though - testing ideas by looking at other web sites is almost like implementing them yourself and

That's the advantage of the sort of analysis in this article, though - testing ideas by looking at other web sites is almost like implementing them yourself and then evolving. This article and comments came at a good time for me just now - I'm working on a cart thing and trying to answer some of the same questions. One area I'm worried about - patents. As if good UI and software development wasn't hard enough, the whole patent mess makes it much more complicated. Aside from technical limitations, from a legal standpoint what can I do and what can I not do? http://en.wikipedia.org/wiki/1-click http://en.wikipedia.org/wiki/1-click