Comic Sees the Future (This Topic Is Lamer Than It Sounds)

Okay, I'm reading Penny Arcade for the first time and going through a 10-year history. I come across this one from 2001 and see a Dreamland Chronicles reference. Not knowing what it is, I Wikipedia it (that's right; I coined that as a verb probably not the first) and find out it's a comic book series written in 2006. WT*? How can this comic reference something that hadn't been written for 5 years?
There must be another Dreamland Chronicles out there, right? Or am I going batty? Or both?
There must be another Dreamland Chronicles out there, right? Or am I going batty? Or both?