Google updated their KML 2.0 docs and gave them a new URL late last week. Included are typo corrections, some missing tags added, some clarification on things like styles. This will help those of you who like to get your hands dirty on the underlying Google Earth features. The post by ‘ink_polaroid’ at the GE Community indicates new tutorial docs are also being worked on by their “fearless documentation guru”. This KML doc update is not a big update, but should make it easier for them to do further updates in the future. Maybe a new version is coming?
Does KML have a schema yet?