I have a workflow that has a form where datafields would be hard to manage (80 of them) and the data is not really normalized for a smart object. Instead we used xmldatafields. I don't have time to pretty this up but wanted to post my notes.  I hope they help you. Things to know, use client connection not management ...

  How to delegate the worklist to a user through API (I am creating a custom task list using ASP.NET)?   I am able to redirect, release, and sleep. But not delegate through the APIs. Is this feature supported?

The way your post is framed, it sounds like you wrote your c# frontend using the K2.Net 2003 API, or you are at least trying to re-use some of the same codebase from the previous version. If this is the case, you need to download the Developer Reference documentation (just came out a couple of weeks ago) and use some of the many code examples ...