NXT-G 2.0 has been released and available for purchase through LEGO Education. It offers data logging capabilities as was found in the software for RCX system. So all the stuff we've done by hand in Excel can be done in NXT-G.

NXT-G 2.0 LEGO Education

Here is a tutorial for the new data logging function of NXT-G.
NXT-G 2.0 Tutorial