I love 'em. They're (almost always) funny, (usually) about current events, and updated on a regular basis (if God loves you that week). Here are a few that I check out regularly:
Alien Loves Predator
If you like them, make sure to check out the previous archived strips.
NOTE: In PVP there's a running gag that kills me everytime they use it. I've called it the "General Lee gag" (click for 9/27/05 strip that uses that joke). Basically, one character says something like "Hey, ___ is happening across town! If we take ___, we can get there fast." The other character says "No, the traffic will slow us down too much. Unless..." The last scene is them do a "Dukes of Hazzard" jump across a broken bridge in the General Lee.