Sony is going to court to target the PS JailBreak, PSFreedom and PSGroove related PS3 hacks.
According to court documents any third party who SCEA learns may be involved in the distribution or sale of the PS Jailbreak software PSGroove, OpenPSJailbreak, and PSFreedom, or who may have knowledge of the distribution or sale of this illicit software can expect a write from Sony.
PS hacker Mathieu Hervais gets a mention in one of the documents as recently proclaiming to be one of 20 individuals behind PSGroove. Of course telling the BBC you are one of about 20 hackers involved in PSGroove's development is going to get you named.
Just under a month ago Sony was granted an injunction by Australian Courts on the sale of PSJailBreak PS3 modchips, followed by blocking PS JailBreak and PS3 proxy methods with the release of the PS3 Firmware 3.42 update.