Well, that got me motivated to look at my 401(k). The good news is that it looks like it's 0.51% for me.
One thing I'm not sure on is my bond fund, though. It's an internal fund (no public listing) that buys AAA-BBB funds with the largest holding in treasury notes. There's no expense fee, which sort of makes sense, but I can't find any info on what other fees there might be. Maybe the company is just encouraging investing to increase their overall fund size.
edit. By far the largest fee is the 0.83% for the oakmark equity & income fund (oakbx). Since I'm 32% in that, 16% in the bond fund, and 27% in Dodge and Cox Stock Fund (dodgx), maybe I should rebalance out of the oakbx and into the bond and dodgx fund... if I throw it on m*, I'm guessing there's a lot of overlap in the equity holdings between dodgx and oakbx (they're both lv-weighted)