Why is former Alaska governor and Republican vice presidential candidate Sarah Palin passing on the summit of self-styled conservative Christian "Values Voters" this weekend?

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It's a question worth asking because the annual meeting of "Religious Right" activists has become a "must attend" on the political calendar of any Republican who is serious about running for the party's presidential nomination in the next election cycle.

Former governors Mike Huckabee and Mitt Romney  -- frequently mentioned as 2012 heavyweight Republican contenders -- will be there.  So will Minnesota Gov. Tim Pawlenty, who many pundits see as another possible candidate for a White House run in 2012.

But the moose-hunting hockey mom who makes liberals see red remains the favorite with this crowd. A recent Bliss Institute and Public Religion Research survey found she was ranked highest among conservative leaders by conservative Christian activists with 86 percent viewing her in a favorable light.

Does her no-show suggest something about her political intentions or lack of them for 2012?