The package called EasySAX has been renamed EventDOM. It may be renamed again. I haven't put in time to think about names properly yet. The current status is that I've developed the idea and I have 90% of the code written. I will hopefully get a chance to finish the code in a few weeks but anyone who is brave and interested can ask me for it in the current state and try and make it work. There is a couple of days work there...
A rough, alpha version of the package is available here.
I have some slides here explaining the basic idea: (xml, ppt, pdf) I gave these at XTech 2000 when I was still calling it EasySAX.
Discussion about the package currently takes place here. Please feel free to join in!