Predictably, it's missing some important features that make zoomable user interfaces great. For example, there is still a distinction between zooming in on a document, and actually opening the documentâ€”I don't see how it would be possible to fix this problem while still remaining compatible with Mac OS X, though.
Even so, while Raskin probably wouldn't work as a full replacement for the Finder, I do think that it provides a useful alternative view of your data.
Found via Oliver Reichenstein.
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