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Not too far off the current, but a little cleaner IMO.
Yahoo also seems to be waking up to the fact of more users with larger screen resolutions - the new version uses larger text size, which does the eyes a wealth of good if you're on hi-res. Much cleaner, much easier to read, but still the same basic yahoo look'n'feel.
Notes on checking this out: you'll want to run two different browsers or one browser under different profiles - the new yahoo sets a cookie so you won't be able to go back to the new one. Browsers will typically give you gzipped size if you click for 'info', but this is misleading here - the 'old' yahoo gzips down to a much smaller size because of the many repetitive <font> tags and other such old cruft. Save the files if you want to see their size non-gzipped.