The W3C Synchronized Multimedia Working Group has published what is both the first public and last call working draft of SMIL Timesheets 1.0. "This document defines an XML timing language that makes SMIL 3.0 element and attribute timing control available to a wide range of other XML languages. This language allows SMIL timing to be integrated into a wide variety of a-temporal languages, even when several such languages are combined in a compound document. Because of its similarity with external style and positioning descriptions in the Cascading Style Sheet (CSS) language, this functionality has been termed SMIL Timesheets."
This was formerly part of the SMIL 3.0 spec so making the same document both first an last draft is not as strange as it seems. Comments are due by February 15.