This is indeed one of the tools to which I was referring.
To answer some questions asked in this thread:
Correct, you can certainly create a profile with X-Rite's Passport software, then tweak it in Adobe's DNG Profile Editor if you wish. Tutorial 3 on the DNG PE page explains how to do this: http://labs.adobe.com/wiki/index.php/DNG_P...l_base_profiles
No, Adobe's DNG Profile Editor and X-Rite's Passport software do not share the same automated profile-building technology under the hood. The profile-building methods were developed separately and independently. Hence you can expect that profiles built from the same measurement data (i.e., from a single chart shot, or pair of chart shots) from the two software programs will differ somewhat. Similar to how you can measure a printer profile target, obtaining a single set of measurement data, but produce rather different printer profiles by using different software (e.g., ProfileMaker vs MonacoPROFILER).
Due to technical limitations, camera profiles are necessarily imperfect, and hence each software must make tradeoffs in terms of which color characteristics it is optimizing for. Since different software programs tend to optimize for different things, it is natural that the resulting profiles will also behave somewhat differently.