In my blog CHIPs, PageBuilder and the Side Panel - Part 1 I have told you that currently there is no SAPlink plugin for Web Dynpro CHIPs.
Good news! I have spent some time to create it myself.
You can download it at google code ™: http://code.google.com/p/saplink-wd-chip/
or at SAP Code Exchange ™: https://cw.sdn.sap.com/cw/docs/DOC-146264
I have also decided to write a blog "part 3" about the Page Builder and how you can create IFrame CHIPs. So stay tuned and you will see me soon!
RV SAP Consultancy.