Also reveals 1.4 million iPhone viewer downloads.
Justin.tv's iPhone viewing app has been downloaded more than 1.4 million times in a month since its release on the App Store.
CEO Michael Seibel blogs that users have spent more than 145 cumulative years interactive with the app, and that it's now accounting for 20% of signups.
The Justin.tv service focuses on letting anyone livestream video from their webcam or mobile phone. Seibel thinks mobile is key to its future.
"Mobile and live go hand-in-hand and there has already been a lot of action in the mobile live video space, but the devices and mobile platforms are at a tipping point," he writes.
"iPhone OS 4.0, the arms race in Android phones and the quickly-maturing Android platform are going to make the mobile live video apps at the end of 2010 look nothing like the ones we saw at the start of 2010."
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Justin.tv isn't the only company in the mobile livestreaming space though: it faces competition from the likes of Ustream, Qik and Kyte.
