austtr - 10:11 pm on Jul 14, 2011 (gmt 0)
OK.... how about a couple of non-techie factors?
If your title, description and keyword tags indicate that the page is about a particular subject, but the content is not about that subject, or only makes a passing reference to the subject, then be prepared to kiss that page good-bye. That seems like a statement of the obvious, but you'd be amazed how much content is written that does not match the stated purpose of the page.
I strongly believe that you MUST provide outbound links to authority sites and that's an opinion based on actual case history across multiple sites. You'll get far more value from seeding your pages with connections to quality than any downside of leaking a bit of PR to another site.