And emphasis on saving your blobs. Once an iOS is released, immediately save your blobs the first instance you can or within the next 48 hours of the release so you won't forget. It's extremely important if god orbit anything happens to your device while it's jailbroken.
Yes. All blobs are are basically "authorization keys" if you will, like a password. You can basically buy a 1 tera hard drive and store 20 year's worth of SHSH blob for every single device for every single iOS
Essentially yes. However, if you're on 4.3.3 that means you're using an iPhone 4 or 3GS. If you update to 6.1 right now... you'll still have a Tethered ONLY Jailbreak using redsn0w.
I am on 5.1.1 jb. Curious as to what I should do before I update to 6.1 and then the untethered 6.1 jb? I am going to wait till that is available. Will I lose what I have and basically "start from scratch" with the new jb?