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buckworks - 4:03 am on Jul 26, 2010 (gmt 0)
Webwork, there's nothing lacking here.
If a post moves off the home page of the blog, anything that post links to isn't on that page anymore, right? There's no downward weighting, the algo simply stops giving weight to a link that isn't there anymore! There's nothing lacking about that.
The link WILL get whatever link juice strength the post archive page(s) can deliver, and such page(s) must earn their Page Rank form the pages that link to them.
It would be more accurate to think of the link having a temporary boost while the link is on the blog's home page ... but the permanent link value will be whatever the blog's permanent pages can deliver.