g1smd - 3:50 pm on Nov 3, 2006 (gmt 0)

I would not rely on "nofollow" for this. It impedes the bots from traversing your site, and those nofollow links are saying you are not voting for that page.

I would instead rely on noindex on the pages having URLs of the form that you don't want indexed. Google will still parse those pages and follow links to the rest of the site.

As long as the thread indexes and the links to previous and next pages can be followed with a canonical format for the URLs in them then Google should index the site just fine.

Don't impede the bot from traversing the site. Instead let it roam free and then tell it what not to index. Different methodology. Vastly different results.