OK i seen this on Ps3news and at first i got SUPER happy... But looks like it's still not able for you to login to PSN
BUT this is a NICE step and hope soon it will make it able to get on PSN...
http://www.ps3news.com/PS3-Hacks/pl3-payload-to-spoof-ps3-firmware-version-3-41-to-3-50-wip/The only reason i want on PSN right now is so i can get my Rock Band songs LOL, Long story