communicating over internet

While using internet on mobile i came across some problems . Well when i was using gtalk on mobile......i was not able to know friends online on my yahoo messenger..... and moreover i was not able to chat simultaneously on them.......well after some days both the problems were solved with help of ebuddy. But now i am facing one more problem.........sometimes use of some sites are restricted in office, college etc........in that case when i have to work with only one site.........is it possible that this type of communication i.e. either vertically (using only gtalk) or horizontally (using ebuddy) can be turned into a gang plank i.e. one who is using gtalk can chat to other using yahoo or vice versa in case of emergency using some technology......