i'd love to see a few lines of static text in the cmd (like cgminer for example). So, each card should be listed with temp, last khash, valid/invalid shares etc. is this maybe possible? that way you would have a short overview of your gpu's.
I'm not familiar with cgminer's output, but I gave Christian the beginnings of a patch to enable cudaminer to print GPU temps, fan speed, and power consumption data as reported by the NVIDIA drivers. Not all GPUs are capable of reporting all of those measurements, but all recent GPUs will report temperature and fan speed. Here's an example log from my patched version of cudaminer. I'm sure that it can be improved a lot beyond the code I sent Christian, but this is at least a starting point:
[2014-03-09 23:07:24] Stratum detected new block
[2014-03-09 23:07:24] GPU #0: Tesla K20c, 537.70 khash/s
[2014-03-09 23:07:24] Temp: 68C Fan speed: 68% Power: 186W
[2014-03-09 23:07:24] GPU #2: GeForce GTX 680, 321.40 khash/s
[2014-03-09 23:07:24] Temp: 88C Fan speed: 72% Power: N/A
[2014-03-09 23:07:24] GPU #1: GeForce GTX 750 Ti, 266.37 khash/s
[2014-03-09 23:07:24] Temp: 66C Fan speed: 53% Power: N/A
[2014-03-09 23:07:24] GPU #3: Tesla K20c, 541.51 khash/s
[2014-03-09 23:07:24] Temp: 72C Fan speed: 78% Power: 188W
[2014-03-09 23:07:42] DEBUG: hash <= target
Hash: 0000006504c7edb989ead541e02089f081a84d44157c58ae617f37e79503987f
Target: 0000007fff800000000000000000000000000000000000000000000000000000
[2014-03-09 23:07:42] GPU #1: GeForce GTX 750 Ti, 266.31 khash/s
[2014-03-09 23:07:42] Temp: 66C Fan speed: 54% Power: N/A
[2014-03-09 23:07:42] accepted: 17/17 (100.00%), 1667 khash/s (yay!!!)