Knowing the spoof method to get on PSN on <3.50 is dead and that the ability to downgrade the FW is in the works, I have an idea about it.

Other than it being a hassle, could we blast the 3.50 FW and play on PSN, then go back to 3.41 to use our JB? This is ignoring any deletion or need to backup/restore PS3 but if we will soon have the ability to downgrade anything I can't see why this won't work.