I don't know if the CGBenchmark and CGTuner work for x11 and scrypt-n or any other algos but I know haskpeak does and I like it. Are there any future plans for you to implement some of the other features they have?
It's coming. I started working on adding gpu mem clock support last night, but I only got an hour or so though before I had to turn in. The features are not difficult to implement. The only real issue is the graph. If we have 50 different memory clocks and or intensity/xintensity settings, the graph will be very cluttered.
You mentioned temperature readouts. I'm not sure these are all that interesting considering we only run each set of clocks long enough for the hash rate to stabilize and it's unlikely that the temperature will reach its maximum during that short period of time.