So the Limera1n jailbreak using Geohots bootrom exploit will still work on iOS 4.2 but, as you know, the bootrom exploit is tethered so geohot used comex's userland exploit to get it untethered on 4.1.
Apple CANNOT patch the bootrom exploit with a new firmware upgrade. They will have to release a new device. But what Apple CAN patch is the userland hack that makes limera1n untethered.Comex said that we will be able jailbreak our iOS 4.2 devices using Limera1n UNTETHERED if we have shsh blobs for 4.1 or lower.
"Anyone with blobs for 4.1 or earlier should be able to get an untethered 4.2 jailbreak; this is not done but is being actively worked on."
So save your shsh blobs now using TinyUmbrella or Cydia.
The jailbreak might not come out with the new 4.2 that will be released in a couple of days because Cydia is not working on iOS 4.2 yet. But @chpwn is working hard to get it working! So the jailbreak will be "out" when Cydia works for 4.2.
