These are instructions on how to dump the SHSH blobs of your current firmware even if Apple is not signing.
For instance, you can dump the SHSH of the current firmware on your device, so long as the device is susceptible to the Limera1n jailbreak (Everything but the iPad 2) Apple does not have to be signing the SHSH in order for you to dump the blob.
*Note the iPod Touch 2G and iPhone 3G will not work since they will always be jailbreakable. The iPad 2 will not work because it is not susceptible to Limera1n. A jailbreak is not needed for this.