How to add the listbox items using UiBinder?
It is possible since february 2011 version:
http://code.google.com/p/google-web-toolkit/issues/detail?id=4654
Following this patch you are now able to add items following this syntax:
<g:ListBox>
<g:item value='1'>
first item
</g:item>
<g:item value='2'>
second item
</g:item>
</g:ListBox>