I'm not sure why Jcase posted the root instructions for the Spectrum, but being as he did, we may as well share it. From what the article says, this will work for the leaked version, which, if VZW does not get their act together soon, I will be jumping ship for.
[Exclusive] Here's How To Root The LG Intuition And LG Spectrum On ICS
adb shell
$ rm /data/vpnch/vpnc_starter_lock
$ ln -s /data/local.prop /data/vpnch/vpnc_starter_lock
$ exit
adb reboot
adb wait-for-device shell
$ echo
[Exclusive] Here's How To Root The LG Intuition And LG Spectrum On ICS
adb shell
$ rm /data/vpnch/vpnc_starter_lock
$ ln -s /data/local.prop /data/vpnch/vpnc_starter_lock
$ exit
adb reboot
adb wait-for-device shell
$ echo