Operational Cost of Nimbuz, eBuddy, IM+, Brightkite

[10andrew10]

Hello,

First, thank you for attempting to assist me with my question. :)

What are the estimated monthly operational cost / technology needs to run an IM application such as Nimbuz, eBuddy, IM+, Brightkite with thousands of server transactions a second?

I appreciate your comments and time.

Thanks!