I just received an email from iNav:

Dear iGuidance Customers:

It is with great sadness that we have come to the decision that iGuidance will no longer be developed. We want to thank you for your support in the past 10 years as we certainly couldn't have done it without you. Special appreciation and thanks go to customers who purchased iGuidance since the beginning and continued to encourage us and supported us all the way.

iGuidance volume licensing for corporate and government entities will continue to be supported until all contracted map upgrades have been delivered.

I wonder if they will open-source GPL it or something...