I just want to wish merry christmas and a happy new year from poland.
We hope that you will succeed with building this CMS. It is very promising. My company needed to build a social bookmarking site very fast. We tried pligg and we encountered only problems(!=support). I know Drigg is also a good solution, but we didn't have that much time to spend for learning Drupal.
So we are giving SWCMS a shot. I hope there will be a good exporting tool for SWCMS->Hotaru.
good luck and looking forward to stable 1.0