We have a list of Pololu-related RSS feeds that you can subscribe to. Following our blog is probably the best way to keep up-to-date with us, but we also have a dedicated New Products feed. You can find a list of all of our RSS feeds here:
We did not make this robot, but you might try messaging the YouTube channel that uploaded the video (ScienceOnline) or visiting hilaroad.com, which is mentioned in the video as a source for more information.
You can find more information about our Maestro servo controllers here:
We are definitely planning on expanding our selection of motors with backshafts now that we have encoders for them. Generally speaking, the 5:1 gear ratios have not been very popular, so I'd be interested to hear more about what you want to do with them.