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In recent days, so new players in mining have stormed onto the stage (or perhaps more accurately identified by blockchain.info). I know very little about any of them:
-- BitFury makes ASIC chips, correct? Their pool would then remind me of AntPool and KnC Miner, hardware makers.
You have much to learn if you've never heard of Bitfury. They were the 3rd company to produce ASIC's almost exactly 2 years ago (after ASICMiner and Avalon). Their first gen chip using 55nm could do <0.5w/gh IIRC which is even competitive against current gen ASIC's.
-- 21 Inc. is the new & mysterious company that wants mining in almost any electrical device, correct?
21 inc is not a new company, they've been mining for more than a year and always held a few percent of the total network hashrate. The company is based in Silicon Valley and previously went under the name of 21e6.
-- Who is Telco 214? My Google search was not very instructive...
They've been mining for at least 6 months. They only have 1.4 PH/s (
source) so I wouldn't really consider them a major player.