Well, this what the white hats are up to, as it is set in the TASKS file from the cvs:
Digicrab:

CURRENT:
* Pull out all item/weapon data into files
FUTURE:
* Translate all hardcoded item effects into data
* Implement UB style IMP creation
* Add the FN Minimi, RPK-74 and H&K 21E into the game as full automatic weapons
* Add the Flamethrower back into the game with appropriate graphics
* Add jeep inventory
* Leveling up adds mad (or just plain ordinary) skillz
* Character gets personality traits based upon his actions in the game
* Player can turn on turn based mode
* Rocket Rifle, regen etc. go out of Platinum
* Rebalance weapon ranges, accuracy
* Console
* Shooting crows no longer angers militia (avian lover freaks)
* Rebalance HtH is allow sneak silent attacks
* Take away mortars and laws from enemy troops in Platinum and give them the LMGs instead
* Make being shot a lot more detrimental to one's accutacy in PLATINUM
* Reinstate can+string and other lost combos
* Rebalance weapon progression+finances to allow all itmes to be dropped
* Make all personalities mean something
* Attack Dogs (thx Hunter of Death =)
* Multi-turn aiming (snipers?)
* Different reloading costs for weapons
* Persistant merc database between missions/campaigns
* New SLF editor
* New STI editor
* New MAP editor
* Possible combat drops via helicopter

I've'd just downloaded and compiled the cvs source code today to see what is new, and some of this are already implemented.
Some of the guns have already the full auto capability (the AK-74, for instance, now has three shotting modes: single shot, 3 rounds burst and full auto - in its case this means a 6 bullets burst, and as I seen when shooting with it this way, it also has an "area of effect"). Did not get my hands on a H&K21, RPK-74 etc to see if the full auto in their case means that you can empty a clip in full auto mode. For now, this has a set back: if a gun isn't full auto you can't enable the burst mode, so you can use short burts just with the full auto weapons, all the other are forced to be just single shot guns.
The energy boosters and regen boosters can no longer be used. I found some in the game but they do not "mix" with a mercs body anymore (you can just click with a serynge on the mercs body forever and nothing happens, the serynge is still in your "hand").
No inventory for the Hummer yet!
Some of the data were externalized. I noticed two files, Cities.dat and Weapons.dat. The Weapons.dat file is fairly well documented, but thats not the case with the Cities.dat. Altough they have the .dat extensions are just plain text files, you can open and edit them in Wordpad. The Weapons.dat file contains the weapons data and the Cities.dat contains the soordinates of the towns, but I don't know yet if and how one may alter them to create a new game world with the towns in other sectors than in JA2 and UC.
For now, this are the major things I noticed about what had been changed in the source code. I will examine it in the days to come and keep you posted.

Originally posted by Madd Mugsy:
Best bet is to search the files for "Digicrab" as he commented most of his work (unlike me - I just diff everything)