Segway / Pogo Stick balancing with Arduino

I would like to make a robot that would somewhat look like Sageway / Pogo Stick: just two wheels and a tall structure. Now, I need some algorithm to keep the balance. I vaguely understand that algorithms based on fuzzy logic are fairly simple to code.

Is there a standard algorithm for keeping things balanced?

It's a simple, and very well documented control system. And there is lot's of information already so it would be pointless regurgitating it here...

Google "Inverted Pendulum".

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thank you, I wasn't aware of that.

No problem, good luck with it!