I've received the following feedback from a client, and confirmed that 1 and 1c are issues. 1b is obviously a suggestion, not a bug. :-)
1- Search function in the web interface (very important, blocking point): currently, once a column has been selected for a search, you can't switch to another column without logging out. That's definitely an issue right now.
1b- As an aside, a default global search function (that searches all columns) would be an interesting addition as well.
1c- As a bonus, when data is entered in the Search field, would it be possible to have the focus automatically moved to the Search button? Users tend to hit "Enter" after entering a search string, and right now, this triggers the opening of a
password entry, not the search.