This is probably more of a request for a new module, but...  The POJO model is 
very popular with web applications;  and very often when you create a UI, it 
will actually be setting values on some JavaBean.

What might be very nice is a tool that will take an existing Java class, find 
all the properties on it, and generate a skeleton UI with appropriate 
components and labels based on property names, etc. from a JavaBean.  It 
doesn't have to actually try to design the layout in any way, just generate 
appropriate components.  

Given the (un)popularity of BeanInfos, etc., probably the PropertyPanel-style 
approach is not the right one - better to make some inferences (integers get a 
JSpinner, enums get a JComboBox, possibly do something cute with constants and 
combo boxes if you can infer that that's all a property will take) and let the 
user handle layout, validation, etc. - just generate methods that do all that 
that the user can edit.