The last part of the ruling essentially gives Sony full control of PS Jailbreak in Australia.
It should be noted that Australian law is a bit different than American law when it comes to devices such as this. In Australia, the mere act of modding a system is not seen as illegal; it's only illegal if that modification is then used to play unauthorized games. To use a bit of a classical example, downloading a Nintendo Entertainment System emulator is legal, but then downloading Super Mario Bros. is not. In America, the law is a bit murkier. The Digital Millennium Copyright Act (DMCA) forbids breaking the encryption of a protected document or system to copy or modify something without permission, though the recent ruling against Apple that makes jailbreaking could act as the precedent to make PS Jailbreak legal in the U.S. (the decision only applies to mobile phones), as it technically allows legitimate use. Furthermore, legal challenges to the R4 have been unsuccessful, though Nintendo continues to file suits in civil court.
In the UK, the law is cut and dried: devices such as this are banned, as decided by the High Court when they banned the R4.
If precedent means anything in Australia, then PS Jailbreak resellers are likely in trouble, if the judgment against RSJ. IT Solutions back in February is any indication.