I am currently Jailbroken on 4.1 and I have all my SHSH's saved via TinyUmbrella. I only really use the Jailbreak for MyWi and Sb settings. Both things I could probably live without. But MyWi is pretty handy in the very occasional pinch. Question 1: With the current news on the state of the 4.2.1 JB. Can I go ahead and upgrade and be able to JB later? I can do without MyWi and SB settings for a few days. Question 2: Is there any drawback to Restoring and updating my iPhone 4 software to stock 4.2.1 and use my backup from my previous jailbroken 4.1?