Once again, a lot of overreaction because the abstract sounds scary.
If you actually bother to read the claims it becomes quickly apparent that Apple isn't going to be able to sue anyone over this and if they did, it would be trivial to work around.
Claim 1 states that the unlock gesture is along a pre-defined path. Claim 3 goes on to further state that the displayed path is a channel. Claim 5 goes even further and states that it's a horizontal movement.
There are plenty of other implementations that are completely unlike this. One of my friends is using a custom ROM (not sure which, CM maybe.) on his gTab where the unlock screen involves dragging a circle to any number of icons that can appear on screen, whereby dragging to a particular icon will cause that app to be loaded on unlock. Completely different, and arguably a much better implementation.
It seems that other parties have already found other and better ways of handling device unlocking and I doubt that this will ever show up in court, because even if it does, it will take less than a day before it's been worked around. But don't let that get in the way of the usual uniformed circle-jerk about patents.