bbUI appears to only support input type="text". For these fields, it formats the input box correctly, stretching it to the full width of its container.

However, for the numerous other input types, they aren't formatted correctly in an automatic way:
tel
url
email
number
time
date
datetime
color

http://blackberry.github.com/WebWorks-Samples/kitchenSink/html/html5/inputtypes.html