HttpService 2.3 implementation?

Hi there,
seems that the HTTP bundle is really just implementing the Servlet 2.1 spec. 
Is there any possibility to run 2.3? Seems that the servletbridge is more 
powerful? Are there any other implementations around?

Wicket needs stuff like storing attributes in sessions, and getting the Locale 
from the request etc. etc. so I'm a bit stuck there.

/peter