Re. form layouts, there are 4 currently. With the `inline` change that we were talking about, here's the list of what they do:

- **Default form** (which is the new inline. Just add `yui3-form` to the `<form>`)
- **Horizontal form** (this right aligns the labels. Maybe we can rename it to `form-aligned`?)
- **Vertical form** (this is the current default form. Maybe we can rename it to `form-primary` because it's the standard look and feel for a form?)
- **Grouped form** (this groups input elements within a fieldset and removes margins. Does `grouped` possess any presentational semantics?)