This is not really an answer, but just to add fuel to the fire: There have been several attempts either to standardize a set of widgets for the web or to create

This is not really an answer, but just to add fuel to the fire: There have been several attempts either to standardize a set of widgets for the web or to create a library popular enough to be a de facto standard (e.g., semantic tags in HTML 5 and JQuery Widgets). They have all failed. My SWAG hypothesis is that, unlike native applications, web apps are as much application as they are branding opportunities. PhotoShop on the desktop has too many buttons to leave room for branding. A web application will typically leave copious real estate for branding, cross-promotion, mascots and other graphics, etc. You typically have a lot less stuff in a view/page, and that stuff usually receives more aesthetic customization and visual design attention.