I would suggest to close it after we get the interfaces approved at some OGC meeting and ready for a release. At the very least, we need to known in which GeoAPI release they will be bundled (2.1? 2.2? 3.0?) in order to fill corectly the "Fix Version/s" field at the top of this page...
I still unable to attend to OGC meeting for the next three months. But there is an OGC meeting planned in Virginia from 2006-10-02 to 2006-10-06 (http://www.opengeospatial.org/events/?page=upcoming). I should be in Canada at that time, so it will be much easier for me to attend to this OGC meeting and submit the GridCoverage interfaces there. We need to write a "Request for change" with at least an overview of the interfaces, a list of any addition or departure compared to ISO 19123 together with a rational for them. The document that you wrote like "ISO 19123 primer" can be of great help (if you agree that we use it).
The whole GridCoverage packages in GeoAPI need to be replaced by new interfaces derived from ISO. We hope to fix this issue at this time.