I came up with this: it would be great to get dataTables to create a HTML select for every column containing one select entry for every occuring value in this column (plus one for show all values)? Then the user could choose one value and the table would get filtered accordingly. Alternatively check boxes might be useful making it possible to apply more than one filter to a column.
This might even be expandable to a kind of tab navigation. Select one column of the table and the occuring values produce one tab each. One tab is default, clicking on another one filters the table accordingly.
Any ideas to implement this with the current tools or should this go onto the wish list?