By the way, how do you plan to revoke sources from 100 of groups which have them now?
Simple. Release a new version which drops connections from servers older than prior version. Revoke access to the proprietary closed source binary to those you no longer want to run the server.
You are talking crap here. It is essential for ripple network to have many servers running by different groups. Whatever OpenCoin does, this will not stop those who have server codes continue running their servers. Even if OpenCoin disappear immediately after ripple release, the network will continue to run until somebody is running servers.
It isn't essential for OpenCoin that ANYONE but OpenCoin (or approved lackeys) run servers. It may be essential to your goals but OpenCoin has indicated that the network will work fine with just a handful of servers. With decent hardware a handful (or one) server could handle tens of thousands of transactions a second without breaking a sweat.
If OpenCoin (and the source code dispaeared) tomorrow you really think the Ripple network could survive? What someone is going to reverse engineer the server software? At best that would be an incompatible hard fork. The existing network operates solely at the will of OpenCoin. Period.