Dan Bricklin and the SMBmeta project should be interested in this: SKICal – Structured Knowledge Initiative – Calendar

“The Structured Knowledge Initiative Calendar – SKICal – aims to improve the information infrastructure concerned with public events (concerts, sports competitions, conferences etc.)
SKICal is working towards this goal by promoting the new international standard specification for the exchange of calendar information which is known as iCalendar.
SKICal work is coordinated by Metamatrix in Stockholm, which has recieved sponsorship from NUTEK – Sweden`s central public authority for matters concerning the growth and renewal of industry.”