As Brad Delong points out, this article in the LA Times completely misrepresents Obama Economic Policy Director Jason Furman's position on Social Security privatization. In fact, Jason is the economist who did the most to supply the intellectual ammunition to gun down Bush's proposal during the great Social Security battle of 2005. Jason, with help from Dean Baker and Brad Delong, was key to victory in that struggle. It's not hyperbole to say that without their efforts (especially Jason's), Bush might have succeeded in his efforts to gut the most important social safety net we have. See this paper for one of Jason's contributions in that battle.
Regarding the broader concerns raised in the article, I think Jared Bernstein has it right:
One economist from the left-leaning Economic Policy Institute, Jared Bernstein, offered praise for Furman, saying he understood why some critics were unhappy, though he thought their fears were misplaced.
"I understand the concerns, given positions he has taken" on some issues, Bernstein said. "But I am 110% certain that it will be Barack Obama -- not Jason Furman or Robert Rubin -- who will be setting the policies for the Obama administration."
Although Furman has directed think-tank work on some controversial topics, Bernstein said he would be an effective campaign staff member. "If you look at his body of work, it's quite clear that the ultimate goal is very much the same as Obama's," he said.