Aaron is currently animating a short film , Snow Bear . He has been doing a series of livestreams showing his process of animating in TVPaint. This is a great way to learn, by watching a master animator at work. (it's like you get to look over his shoulder to watch him animating).
UPDATE , Feb. 28, 2021: definitely check out Aaron Blaise's YouTube Channel for the many additional animation tutorials he has posted in the past six years since I first made this post. You can learn a lot about animating and using the TVPaint interface just from watching his Livestreams of him animating scenes using TVPaint.
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Check out master animator Aaron Blaise's new set of Video Tutorials on the 12 Principles of Animation , using TVPaint. (this is really good stuff , whether you're using TVPaint or not ... it's not software specific , it's all about basic principles . Highly recommended) .
Here's a free sample of one of Aaron's animation tutorials using TVPaint: