I just disabled this. I'm pretty sure its been the culprit in jacking up my FireFox CPU cycles. I wasn't doing anything with it anyway. Are any of you using this? I just did a search for this and everyone keeps mentioning it as indispensable but no one seems to be doing anything with it. Okay, you can do some useful things with it if you primarily use Gmail through your browser. I use Mail.app and I don't use Craiglist much. What else can I do with it? What am I missing? Is this really as indispensable as everyone's making it out to be? Definitely cool though.