improvement for softserial library?

[crosspost from italy] Hi all, i've a question..is it possible modify this library to receive data from different software serial without use listen() anytime? for example,i could have different serial device connected to arduino via serial,which sometimes trasmit few data in asyncronous way..is it possible to modify the library in a way that allow the arduino to receive them whitout change everytime the listening connection?for example,connecting RXs lines to pins which support interrupts..(not only using the attachInterrupt provided by arduino IDE,but the pin change interrupt provided by atmel)

thank u all :)