This is really great news. I recently bought my fiancé an iPad 2 (4.3.5) so there was no way to jailbreak it due to the only option of upgrading was to 5.1
It is indeed excellent news. I've been faithfully saving each new SHSH Blob for my 4S in the hopes that someone would figure out a way to use them. It'll be nice to know that I can't lose my jailbreak ability no matter what happens.