Doubts on jailbreaking

I recently bought a PS3 slim with 4.10 OFW came as default.i upgraded to 4.11.

1)Now is it possible to jailbreak this firmware because i read recently that the recent ones that come with 4.10 cannt be jailbroken.

2)If jailbroken is it possible to come back to original firmware to access PSN.

3)Is it possible to download game updates seperately and install in PS3.

4)What happens if my PS3 is bricked when jailbreaking???