I'm still new to SEO, but I have a decent foundation on it.
To me, it seems like guest posting and earning PR on quality sites is good for the coverage, but will those one-off links really make a difference?
I'd have to assume that SEOs earn their worth when they build scalable links (i.e. tools that people link to, guides, etc)
So, while PR is nice, I feel as if I shouldn't focus my time there, but spending time on building a product such as QuickSprout.com's SEO audit tool, Cappex's college match tool, CNN's budget calculator, Moz's google weather report, etc.
