Then, one must remember that Obama also chose James Lowery, civil rights leader and co-founder of the Southern Christian Leadership Conference, to be a part of his inauguration ceremony. Although this may not "balance things out" for many people, it does seem to indicate that with both Warren and Lowery at his inauguraion Obama is actually trying to build the wider coalition that was part of his campaign, even including those with whom he doesn't agree.
Although I may have concerns about giving another public platform for fundamentalism, I guess I have another concern that has not been brought to light. As an Anabaptist I am now part of a historic church tradition that has long been critical of the church and state shmoozing with one another. During the 16th century Radical Reformation such alliances fostered the persecution and execution of "pacifist" Anabaptists. So, Anabaptists have kept a critical distance between themselves and the state, even though in more recent years Anabaptist groups have engaged in public and political action and others have bought into the conservative, Evangelical agenda.
My concern for Warren's platform at the Obama inauguration has more to do with the dangers inherent in getting too warm and cozy with politicians and the state, such as was the case with another preacher from Warren's ecclesial tradition, Billy Graham, pastor to the presidents. Graham had a close relationship with Richard Nixon. He supported Nixon's policies on the Vietnam War. In April 1989 a memo from twenty years earlier emerged that was drafted from Graham to Nixon after a visit to missionaries in Vietnam. He advocated to Nixon a policy of stepping up the war. This was a dangerous "church and state" relationship.
So, my cautions about Warren and the Obama inauguration have to do with the potential of another uncritical relationship developing between the church and state and the legitimization of conservative political policies. We have seen the damage that has been done with coalitions of conservative and fundamentalist Christians and politicians and what they have done to the name of Christianity. In my opinion, there is probably much more of a need for Obama to distance himself from Warren than from his former pastor, Jeremiah Wright.