Scare tactics work. Microsoft knows this, and it's one of the big reasons they have no qualms about telling people they can get sued into oblivion if they decide to use Linux. That has likely played a part in the various ”Microsoft Deals” that several companies have latched onto. These summits are an attempt to curb that, and help people (vendors included) to feel better about their software choices, particularly in the legal arena:
These conferences will provide the only vendor-neutral forums in which leading attorneys from open source companies and the community can collaborate to understand and solve legal issues surrounding Linux and open source software.
This is definitely a good thing. No software should be put into the dirt simply because a larger vendor “threatens” its users with legal action.