I've been smoking for about 35 years, and I've had to stop innumerable times for one reason or another and not once have I ever experienced any sort of withdrawal at all. Personally, I think those that experience what they refer to as "withdrawal" is all in their head. They realize they're out and they start getting frantic, running from source to source, and, as was mentioned earlier, going through seeds and stems. All they need to do is calm themselves down, know in their hearts that "Hey, I'm not getting high for a while" and just be OK with it.

I've been out for nearly 2 weeks now (can't find any), but I know it'll be coming around again eventually. I miss it, but I'm not going to freak out about it.