You can start already!
We do need UI concepts for the launcher and FRED
We do need UI mockups/interface design work done
We do need launcher backend design done
We do need library research done into WxWidgets to determine its suitability for this project (both launcher and FRED)
We do need some really good documentation on what FRED actually does

(what it relies on, how it does things, etc) and also for the launcher (for example, I didn't know that FS actually reads its command line parameters from a file, or maybe that's just for debugging, or something!)
In short, we really need design work done atm.
In longer, anything you can contribute will be really appreciated.
Hope this helps!