A nifty feature for the official version could be the ability to upload your own images. This only shows on the side that you're playing. Otherwise, you'd get some jerk who uploads pornographic pictures to share with everyone; I've seen plenty of that in Counter-Strike. This would be similar to mods. I've seen Doom modded to look like Santa's workshop. And you could also redefine the sound files used in Worms (I loved using the Ab Fab set where you've periodically hear Patsy shout, "Oh, you bitch troll!"). Obviously, this isn't a necessary feature, but it could allow people with free time to customize their own games.
Man, I'd do anything to be able to "mod" the game like that. You never know, depending on how the program works, it might just have a folder with all the card images, and you could just open it up and put in your own pictures. All we can do is hope...