Pretty much same as it ever was: Filcos rule the Cherry roost, although Coolermaster is making a surprising showing. Das Keyboard sold out and is no longer made by Costar, Topre's are still the elitist's choice, although I'm seeing less fervor over the HHKBs. Truly Ergonomic makes a great board but a terrible business, apparently. Oh, and Filco Cherry Red boards are no longer the keyboard equivalent of the Loch Ness monster or Bigfoot.
Yes, a lot of companies are getting into mechanical (mainly Cherry-based) keyboards, but most of the time these are just companies who are trying to cash in on a bandwagon, and the QC for the boards is sub-par. Corsair's boards may use Cherry Red, but they pussed out and made a lot of keys still use a rubber dome. Razer is.. well... Razer. Logitech's getting into the game, although their offering isn't released yet, and looks to be made by iOne (a big no-no). Thermaltake's Meka G1 is a solid quality MB Black board, and WASD Keyboards is now the go-to company for custom keycap designs and colors on a solid Costar platform.