M. Jared Swenson at TheFairlyUnkempt has published the latest Rogue Space supplement: Rogue Space - Mechs.
There are two files, both free to download - the pocket-sized rules booklet and the set of blank and sample profile sheets.
He also has a module and more rules planned, and maybe paper minis. There's even a bonus mech at the Hektid post.
Go have a read, and better yet a game. He's also looking for feedback. Maybe even join in developing Rogue Space with your own ideas - the footer to this post lists blogs involved.
And there's more. Fenway5 is hoping to have the first issue of Rogue Tramissions out at the weekend, the second is already being planned, and the Darker Edition is ever closer.