I hope Obama will take a lesson from this.  Yes, any adult understands that you can't say with absolute certainty what you will do in Iraq a year from now.  Something big might happen to make your firm intentions unwise or otherwise unattainable by the time next year rolls around.  Much of the press probably understands this.  But they also understand (as we all do) that politicians routinely say they are committed to something when they aren't really, and they will later ditch their previous position by invoking a change of circumstances.
Had Obama not just flip-flopped spectacularly on FISA, he would not now be facing suspicions that his Iraq war position is hollow.
(And no, I don't think it's the substance of immunity from civil suits for the telco's that is the big thing here -- not for me, anyway.  It's that Obama announced a firm position during the primary to gain favor with the left base, and unceremoniously ditched it a couple weeks after clinching the nomination.  If you pull that kind of shit, you can expect your credibility to suffer in general.)