Wicket 1.4.1 supports Ajax file uploads | Wicket in Action
The Apache Wicket project is proud to announce the first maintenance release: Apache Wicket 1.4.1. The most notable change in this release is the transparent support for multipart form submissions via Ajax. Wicket is now smart enough to submit a form using a hidden iframe rather then the standard XMLHttpRequest if the form contains file upload fields.
that was quick.