Hi Tony,
In terms of Google, the authority of a site is represented by it's
Pagerank on a score of 0 to 10, unimportant to very important respectively. Any "page" with a respectable
PR that links to you will get your site crawled fairly quickly. However, the amount of authority you gain from that link will depend on the relevance of that site/page to yours, the quality of the content, and how many outbound links are on that page, to list a few.
But to answer your question, to get indexed, it doesn't really matter what site it is, as long as it is regularly crawled (
PR 3-6 should do). Just make sure you don't link from a site that appears to be spamming or you'll get penalized.