Last I heard there will be a major upgrade to the FS2004 version once the team completes their work with MAAM SIM right now, and then they will work on an FSX release. I check their website and forums just about every day... but i'm not expecting anything anytime soon.
I hope when they do release an FSX versoin there will be two models, one with drop tanks and one without, so that we can see each others aircraft properly in mulitplayer. It would also be nice to know exactly what upgrades will be released in the upcoming 2004 version. I think I remember a post by Jan that mentioned a 3D radio set and a better external model. I wonder if there will be any upgrades to the flight dynamics.
Chris