Yes, there will be more signals added. It's really easy to do but I haven't gotten around to it because there are decisions to be made about what to include and what to name the signals. Look in the file txtSignals.xml to see what is already defined. You can even experiment by modifying this file and trying it.
I have to hope you have a easy way to add the txt signals. Btw, are yu working with multiple txt converters that you have a number of names to deal with?