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Bruce talked at some length about browses. We tend to think of browses more as procedures, but especially for the web it's important to see the browse as a control, and to consider all of the different ways you can style browses. They're just repeating data.
Child browses
You can do all sorts of fancy things with child browses and their locations, including spanning columns so that you have a browse on the left, another on the right, and then a browse underneath that spans the width of the two browses above.
You can also have a child browse inside each record of a parent browses.
Forms
Lots of different field types available for forms - I counted 21. There are several RTF editors available; you can work with image capture (e.g. signatures), etc.
Safe vs unsafe HTML - this is a bit like SQL injection. See the story of Little Bobby Tables: http://xkcd.com/327/
Discussion of validation options - NetTalk gives you lots of control over whether and how informational validation messages appear.
File uploads are supported, single or multiple. Uploads can be immediate or delayed until a button is clicked.
More to come...