I'm sold on the weak dollar + inflation hypothesis. Its not that complicated. Put yourself in the shoes of the Fed and the gov and ask what you would do?
Would you let housing continue to decline, banks falter as a result, and risk depression? Or would you do anything you possibly can to fix the housing price problem?
Well, they've already answered that question. The problem is they can't actually stop the deflation of housing as an asset. What they can do is weaken the dollar to nominally get the prices back up, thereby avoiding many of the most critical problems.
They really don't have any choice.
So, this is what they will do. The only two questions are what are the timing of the inflationary effects, and how to best profit from it.
If you are a long term investor, it's pretty easy to just start positioning yourself strategically for a 10 year inflationary period.
If you are a trader, its a lot more complicated. Most likely the gold and commodities runup we've already had is premature and will selloff before really and truly ramping.