Development is still early on for Steel Storm 2, but it's now been publicly announced and there's a teaser web-site. The teaser site reads "Steel Storm 2 is an old-school FPS in the spirit of Doom and Quake. It's spin off in the original Steel Storm universe. Linux is served first."
There's also a development blog too, but at the moment its light on content.
Pre-orders are available with public builds emerging once the game reaches an alpha state. The price will end up being $20 USD. There's no word right now on the game's roadmap to its official release target.