A new control called K2Panel is in the works.  K2Panel works in conjunction with K2Submit.  Put a K2Panel control on the page, then add standard ASP.NET controls to the panel.  If the ID of the ASP.NET control matches a process or activity level data field, the panel will load/save the control values from/to the workflow ...

This is the initial release of the blackpearl.web.controls example. - More documentation is coming - More features and improvements will be added as time permits.