New version is available at garage and in extras-devel. (ussd-common and ussd-widget are updated, package manager would fetch ussd-comon as dependency).
Now you can create several widgets with different settings and widget can try to reexecute query if it fails. Some regressions fixed too.
I also have written HOWTO, which describes how to write widgets, which support multiple instances:
http://kibergus.su/?q=node/1