Ancestry.com has finally completed the every-name index of the 1910 U.S. federal census. Previously it was only a head-of-household index. With this addition, Ancestry.com is the only place online where you can search every name in the 14 publicly available US federal censuses.
Tried the Ancestry 1910 census for about 15 minutes last eve. Found two transcription errors in that time and a third date marked questionable by Ancestry itself in just one family. There are an additional two errors in the family entry attributable to the census taker. No wonder we have trouble finding our ancestors.