Stuart over at Astronomy Blog is trying to organise the creation of an XML structure for astronomical observations. He proposed the idea a short while ago but has recently posted anew with regard to getting some help in creating an XML schema for this new kind of feed. This sort of thing could one day be linked into, say, Google Earth, to allow people to follow where the telescopes of the world are pointing.
The implications are possibly very important. Future, large-scale astronomical events could be easily organised via such feeds to allow fuller coverage and better public communication.
So if you have any knowledge or input, Stuart would like to hear it. Read more on Astronomy Blog.
Incidentally I recently found a link for Google Earth that allows you to follow planes (on a 30 minutes delay) in real-time through the air. This is very cool and shows what can be accomplished with standardised data schemas. Click for the openATC website.
You should probably look at RTML
http://www.astro.physik.uni-goettingen.de/~hessman/RTML/
which is already being used to describe observations and make observing requests to telescopes. See
http://www.estar.org.uk
and
http://www.telescope-networks.org/