I follow up on Martin's recent comment - if you just let the new kernel "float" without any form of licensing, you actually run the risk that someone else may take the code, license it, and your work is not available the way it appears you want it to be. In brief, intellectual property rights is a difficult area. Open source and copy left are two ways of navigating in these murky waters.
I agree with Martin that licensing the new kernel as open source (and making the code available) is the route that is most likely to promote further development as it may attract new programmers into your group. The disadvantage with open source is that you may loose some control because others may further develop your work - that is the nature of open source. As long as the new developments clearly build on your source, however, such groups cannot just make modifications to your work without letting the enhanced version remain open source.
The second approach also suggested by Martin - to "copy left" your code means you retain more control over it, but at the expense of not attracting (so many) new developers.
OS/2 is a small development environment. One clear disadvantage with that is that there is not enough developer resources to simultaneously pursue multiple routes for solving problems. I am not knocking the work done by Mensys on ACPI, but it appears to have been a more challenging process than envisioned at the start. As all OS/2 users I hope they succeed to provide OS/2 more legs for modern hardware support. However, if the early promises of your work pertains, it may be that it is your approach that solves the suspend/resume and function key issues that are not yet or (worst case scenario) cannot be fixed by the Mensys approach for some modern hardware. In such a framework, copy left is a very good option if you want to retain control over your work while making it available at the same time.
Maybe in not too distant a future, OS/2 users may have multiple ACPI solutions at their disposal with possibilities of replacing one with the other to see what works best for their needs. Truly exciting.
Keep up the good work :-)