Just because Jeewhiz is "pimping his site" already, I'm gonna expose my recent MozDev project.
It will (in theory) emulate <nolayer>, <layer>, <ilayer>, an the Layer() constructor from NS4 in Mozilla, saving some DHTML from a rewrite. I also am doing it to kind of prove a point about how powerful Mozilla is.
If you want to see some semi-working examples already (the project was just announced today at mozdev.org ), find me on AIM or MSN Messenger...
Why post it in this forum though? Good question, since there is no DHTML forum it appears, and it is not solely a JS-related topic, not to mention this *is* emulating some old-fashioned proprietary HTML tags .