Sue, it is just easier for me to leave them in the fridge until they germinate. I've already got more than enough seeds sitting around that aren't in the fridge.
I've had some germinate in less than four weeks too. I just like to keep them there, and it works really well for me, so that is what I do.
Jeanne, I was going to mention the columbine seeds, and forgot. I've been a complete failure at growing them from seed, when putting them in a pot. I'm obsessed with daylilies, but columbine is my favorite flower. The only way I've ever been successful at getting it to grow from seed is to let Mother Nature do it for me. When the seed pods open, I fling the seeds out of the pod, and onto the dirt. I have lots of little seedlings coming up this year using that method. I can transplant them if I want, but for now, I think I'll just leave them where they are, which is right outside my office window. I don't know if they are tough to grow, or if it is just a case of me not being very lucky at growing things from seed, but this method works really well for me. They sit outside all winter doing it this way, so maybe they do need to be chilled.