Have you seen it? Ancestry recently released an improvement to their 'Member Search'.
I played around with it a little yesterday, and this feature has a lot of potential. However, I think a better understanding of how the search works is needed before I can use it effectively.
To access the 'Member Search' feature, pull down the SEARCH menu on Ancestry's screen.
Click on MEMBER SEARCH at the bottom of that menu. The Member Search screen will open with the default search for a member by their name or user ID.
In the past, one had to pretty much know the exact name or user id in order to locate that user. This is one of the areas that has been improved. Instead of needed to know the exact name, one can search for part of their name.