Polymaps - A JavaScript library for image- and vector-tiled maps using SVG.

<i>Love</i> the smooth zooming. That's always bugged me with online maps. And it zooms so <i>quickly</i>, even when encountering new info on a relatively slow connection.<p>Color me very impressed. Though I am with devonrt on this: other projections?

Looks kind of neat, but I always thought it was a shame that spherical mercator has become the standard projection for web maps; it's kind of ugly.

<a href="http://mapbox.com/" rel="nofollow">http://mapbox.com/</a> has some simular maps

Doesn't work in Firefox 3.0.x