goodroi - 12:56 pm on Mar 29, 2010 (gmt 0)
Assuming you have 500 pages that all have significant amounts of unique and relevant text with many, many websites linking to these pages then yes you should have more than 8 pages indexed.
Assuming your site is relatively new and doesn't have alot of quality content or links (internal & external links) that only having 8 pages indexed sounds normal.
To boost the amount of your pages that are indexed you should:
1) ensure each page has paragraphs of unique text not found anywhere else
2) build a strong link profile including links from external sites and properly interlink your internal pages