jonwil
Checking the serial wont help because of key generators which will generate a "random" serial that matches whatever algorithim is used inside the setup program to check the serial number (I myself used such a keygenerator when I reinstalled RA2 to start playing with the PD patch and the TX since I was unable to locate my RA2 and YR jewel cases 
I cant speak for PD but myself, my next things might be:
1.More SW work (i.e. making "un-hardcoded" clones of the Nuke, Psychic Reveal and Genetic Mutator). I think PaD is going to do the Lighting Storm so I wont be cloning that one
2.Paradrop stuff (specifically adding per-paradrop defining of the parachute animation and sound and mabie a new clone customizable side-specific paradrop)
3.Adding new theaters to the game
4.Making more things non-specific or non-hard-coded
For example, there seems to be a limit somewhere connected to PoweredUnit= and PowersUnit= that would be good to find and overcome
Also, the PrismType= list should be expanded (if one can make it a tag that goes on a building, even better but otherwise it needs to be made into a list instead of just one unit.
Certainly if we can make the other tags like PrismSupportModifier= and PrismSupportHeight= per-building, that would be good.
Also, one could make the SlavesFreeSound=, SlaveMinerDeploySound= and SlaveMinerUndeploySound= unit specific
And the BunkerWallsUpSound= and BunkerWallsDownSound= building specific.
5.Prerequisite stuff (if I can actually find where it checks the prerequisites that is)
6.4th side stuff (since its very much requested)
And just generally, whatever I can find to work on
Or whatever people like bobbing and PaD suggest I do
I cant speak for PD but myself, my next things might be:
1.More SW work (i.e. making "un-hardcoded" clones of the Nuke, Psychic Reveal and Genetic Mutator). I think PaD is going to do the Lighting Storm so I wont be cloning that one
2.Paradrop stuff (specifically adding per-paradrop defining of the parachute animation and sound and mabie a new clone customizable side-specific paradrop)
3.Adding new theaters to the game
4.Making more things non-specific or non-hard-coded
For example, there seems to be a limit somewhere connected to PoweredUnit= and PowersUnit= that would be good to find and overcome
Also, the PrismType= list should be expanded (if one can make it a tag that goes on a building, even better but otherwise it needs to be made into a list instead of just one unit.
Certainly if we can make the other tags like PrismSupportModifier= and PrismSupportHeight= per-building, that would be good.
Also, one could make the SlavesFreeSound=, SlaveMinerDeploySound= and SlaveMinerUndeploySound= unit specific
And the BunkerWallsUpSound= and BunkerWallsDownSound= building specific.
5.Prerequisite stuff (if I can actually find where it checks the prerequisites that is)
6.4th side stuff (since its very much requested)
And just generally, whatever I can find to work on
Or whatever people like bobbing and PaD suggest I do