Has Apple stopped signing firmware for 4.3? I just tried to back up my SHSH blob with TinyUmbrella and it only saves 4.3.1.
Also, consider the following. It seems to me that there is a very small number of iOS hackers out there, with most of them working in groups. We know jailbreaking is probably the biggest "concern" for Apple right now, which is upsetting to me, but it's true. Imagine that they brought a couple of the hackers onto their payroll for, say, $75,000 a year. This would be akin to giving someone a nickel to people like you and me. They bring in about $2 billion dollars per year via the App Store, ***************************** in at least just on the apps that are currently available. Let's face it, if there were $200+ apps like Photoshop and whatnot, 95% of the people using it would not be using a legitimate version, just as is the case with PC applications. It is the lack of apps like this that is separating the iPad from being a toy and an essential device.
They could wipe out the jailbreaking community by doing this. Didn't they send people in black suits to that person's house who found the iPhone 4? Seriously, from an economic standpoint, it would be well worth it, and I would be very surprised if they weren't doing it now.