Anyway/anyways?

From the Economist Johnson Blog:

Watch it, anyways

Feb 4th 2011, 13:32 by R.L.G. | NEW YORK

HERE'S something I hadn't known: first, that some people consider the use of anyways to mark an ill-educated boob (I'd have just thought it casual). Second, according to Gabe at Motivated Grammar, that anyways is an "adverbial genitive", and so in this form is grammatically equivalent to sometimes and always. I'd never thought about how that s got there, but now I see that that genitive s is just a grammatical sibling of the possessive 's in Mary's house. Why did always become mandatory, sometimes become two-way ("sometime" for the adjective, as in "a sometime grammar pundit", and "sometimes" for the adverb, as in "I pontificate on grammar sometimes"), and anyway become a prescriptivist shibboleth?  Gabe doesn't know, and I don't either, but there are the facts. The linguistic fact is that there's nothing wrong with anyways, but the sociological suggestion is that you should use anyways only in the company of people who already know you aren't an ill-educated boob.

Source: http://www.economist.com/blogs/johnson/2011/02/genitive

Extra reading: http://motivatedgrammar.wordpress.com/2011/02/03/s-series-i-anyways/