I think it would be nice to be able to come up with different pets. Fish Tycoon for Palm OS has beam capability for the fish, but only to move the fish from one device to another.

I can't speak for LDW, but I know that they very much appreciate suggestions for their games, and they have even conducted polls to determine what the people who play their games would like to see. I also know from the comments that Arthur has made in other posts that they are pretty busy working on their new game and a couple of other projects.