"...what will you think when Google does add those to its ever-growing list of 'things we don't really like anymore'?" via +Julie Joyce
Good question. The thing is: every time the algorithm changes significantly, new techniques are introduced that maximize results within the new system. And once the technique du jour becomes too heavily exploited, Google change the algorithm to address it. In the end, any "techniques" that are scalable will ultimately be added to that list of "things we don't really like anymore," a point that's been made and discussed for quite a while.
The irony is that the more Google pushes the SEO community toward traditional marketing and PR, where traffic is gained directly through vertical sites, social media, earned subscribers, etc., the less reliant all of us will be on Google.