I'd love to put it on a public go server and will try to convince people :) However, this will have to wait until after the match in March, that's our number 1 priority at the moment.

There are graphs in the paper showing how it scales with more hardware.

It seems that Facebook's AI is playing on KGS and on there it plays at about 5dan amateur in strength. Would love to see AlphaGo on KGS!

Deep Blue was only innovative in that it was specialized hardware for this type of search. The algorithms it used were well-established, and as there was no way to play it as a piece of hardware without great expense, there wasn't really a reason to keep it around.

Chess engines you can run today, for free, on your own laptop, are far and away better than Deep Blue (and any human), and I believe still don't reach Deep Blue's raw speed.

I'm curious: is there a Chess league for software? And if yes, how far are they already better (in ELOs) than humans if run on commodity server hardware?

I think that would be

https://icga.leidenuniv.nl/

I can't find the claimed ELO for Jonny (current champ) but Junior (previous champ) is listed at 3200+, Magnus' top rating, the highest ELO rating ever, is 2882 for reference

This is not a serious competiton. For serious stuff, see for example:

1)http://tcec.chessdom.com/

2)http://www.computerchess.org.uk/ccrl/4040/

There is a lot of politics in chess programming but the bottom line is that Komodo is currently the strongest program followed by Stockfish (which is distributed under GPL).

"put away like Deep Blue was"

So what? The Stockfish app on your phone is stronger than Deep Blue was.