FekLeyrTarg reports that a new WC mod demo has been released for FreeSpace 2. Deathsnake is working on making a Wing Commander 2 style campaign as an addon to the WC Saga Prologue. Both English and German versions are available in 134 meg packages. There are two playable missions now, and an additional update should be released soon that includes four missions. You can follow the development in English at HLP or German at WingCenter.
Have fun and please respond with changes for future updates :)