Just curious to see if anyone else have this happen. I have a new site (les than a month old) with only a couple of links from some directories and as soon as google found my site after a week or two most of the pages that were indexed turned supplemental. If this is the case then there is no chance of ranking a new site.
New sites usually go supplemental due to no incoming links and low pagerank on the internal pages. Just keep building your content and work on getting links. If you do a little work your pages will start coming out of the supplemental index.