Pavlova, Phar Lap, Crowded House and now Xero?
<a href="http://en.wikipedia.org/wiki/Xero_%28software%29" rel="nofollow">http://en.wikipedia.org/wiki/Xero_%28software%29</a><p>(You can keep Russell Crowe though...)
Not sure you can reliably measure the size of a business based on its social media engagement, nor Stumble Upon "views" for that matter. Some of the fastest growing companies (based on things like, you know, revenue, profit etc) are enterprise businesses which inherently have less social interaction than a recipe or deal sharing site.<p>Also, no offence intended to Guy (the creator), but is it a coincidence that his Lifx startup is #1, and that that is heavily due to the StumpleUpon views which have jumped massively in the last week? Looks a little too convenient to me ;)
Is bugmenot and retailmenot Australian? I can find references to an American company whaleshark. The rest I find of dubious value as I am not in their target market. I find the Australian startup scene as mostly a poor copy of US projects from 6m-2y ago. New ideas don't stay down under for long.
I'd like to see a startup specializing in web fonts that aren't completely unreadable on Windows. Seriously, most of the letters on that page are literally in multiple pieces.
What are the metrics based off of? What is fast growth vs big growth? I couldn't find it on the site and I even downloaded the CSV data but it only had the aggregated numbers.