I don't think there is an issue with Google indexing, they index my/our servers just fine. As Brian already wrote, a http://ampr.org/robots.txt file should have no effect on that. Besides (at least in the current version) there is nothing in that file that would prevent such indexing aside from a /wp-admin/ directory.

What you need for Google indexing is links from other sites, that are already being indexed, that point to you. And some patience.  It is not like a newly crawled site will appear in the index the next day.  Or even the next week. (maybe they do some re-crawling to avoid indexing scams and other malicious sites)

Rob