I have added some symbols to the list, among them the much requested closed integrals. What I have not yet added are symbols from pxfonts/txfonts and MnSymbol. I have also added some compound symbols e.g. \not\equiv but I don’t know I if I have caught the most common use cases for \not. Just let me know if there is more to be added.
The new symbols will need some training of course. The next thing I will do is improve the symbol table to make it easier to look for symbols when recognition fails.
I also realized that some symbols that I have categorized as mathmode or textmode actually work in both text- and mathmode. If you spot any errors please let me know!