Here’s an interesting article Richard Leadbetter from Digital Foundry for eurogamer.net.
It is about the possibilities for Sony to detect jailbreaked consoles and homebrew software.
“However, Sony has been remarkably restrained in its response to the Jailbreak even though PSN has been vulnerable for some weeks over the last few months. Does the company have the tools to track Jailbroken consoles and if so, why haven’t we seen the banhammer fall already?”
“Firmwares 3.42 and 3.5 worked in locking out Jailbroken consoles with the minimum of fuss. Hacks to get compromised consoles onto PSN were neutralised relatively quickly and you can expect the current access Jailbreakers have to PSN with Geohot’s hacked software to be revoked imminently with a new system update.”
“In future firmwares, expect internal checks to be carried out during run-time and on boot to ensure the integrity of GameOS – these are trivial for Sony to code, invisible to the legitimate end-user and much more difficult to reverse-engineer.”