Substantially more URLs in Site Map than are being Idexed by Google

Hi guys,

I have 1600 URLs in my sitemap, but only 60 have been indexed by google.

Can anyone tell me why that is, or more importantly, how I can improve it?

Thanks,
Jeremy

How long have you been running your site?

Google will rarely do full indexing of a site, although smaller sites like yours are more likely to approach full indexing. That is, Google could crawl all of those pages in a single gulp.

How is your traffic and long tail?
Measuring Your Long Tail - vBulletin SEO Forums

The site has been live for bout a month and a half. Not seeing traffic from many keywords (which I think is directly tied to most of the pages on my site not being indexed...)

1 KW is the url MySiteName.com (59 visits)
2 KWs are derivatives of the site name (with and without spaces) (3 total visits)
1 is a username (1 visit)

It's still early. To speed up the process, try getting some outside links to your site, including to some of your threads, etc.

Also make sure you've gone through the following resources for tips that could be applicable to you:
Your Site Review - Stuff to Do First

Briansol's Ultimate Guide to vBSEO