To quote: 3.56 Version Spoofer does exactly what it says and can restore back to 3.55 if needed. It was never intended to allow PSN access but to stop the system from updating to 3.56 (I made it shortly after KaKaRoToKS had his false alarm).
Once the PS3 is spoofed it will stay spoofed until it is uninstalled.
Press CROSS to INSTALL 3.56 Version Spoof
Press CIRCLE to UNINSTALL 3.56 Version Spoof
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That's a broad generalization. I just plan on taking the games online as much as I want until (or if I ever) get banned. If/when that does happen I won't go buy another PS3. That's what I have a 360 for which is infinitely better online gaming. I'll just accept it and play PS3 games offline for free. And I'll still have the better of 2 online experiences left.