Sometimes it would be helpfull to refer to a cell of a different sheet using the
sheet number instead of the name of the sheet.
Stefan Weigl published a user-function that can find the name of a sheet when
submitting the number:

function Tabellenname(Nummer as Integer) as String
        Tabellenname = thisComponent.Sheets(Nummer).Name
end function

It would be fine to have this function or something simular (perhaps an
enhancement of the function CELL) as a standard-function in sCalc.

cheers