The sneak peaks I've seen are very promising, and I've been working on a counterpart to it all.
It's still in the proof-of-concept stage, but you can mess around with it.
http://dungeoncrawl.us.to/eq/mapvis/?zone=dawnshroud
For initial testing I'm just dumping the map files that azone2 produces. They still need chunked up according to the map's octree so we can get some culling performance boosts, but on a reasonably modern machine and browser it's perfectly usable as-is.
I've tested it in chrome and firefox, but chrome has the best performance.
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