Everything major is present. The Core systems (DMT, FLIR, AG targeting) are all present. The TPOD suffers an issue where it will not slave to the INS target point, but the TPOD will slave the INS to it's target point. So once you start using it, the jet will target what it's looking at, but you'll have to manually slew the pod to that location.
The bomb release interval is working in the development version and should be hitting the beta soon.
INS is working now.
Every weapon modeled works great. There are questions on if GBUs or Laser guided rockets are coming, but no word on that.
It's flight model is very nice.
There is a current bug where the sidearm and sidewinder volume drops after a bit, that's new.
Overall it's fun, I fly it mostly. Razbam announce last week they hired a new coder who is working solely on the Harrier and Decoy has been checking into the bugs.
Hope that answers what you're looking for.