Ohhhh, must've been the one I always go to - Knitting Time. I like it! They help me out a lot. I go there for the fancy stuff and unusual needle sizes (say, 16" circulars in size 17 :?? ), otherwise I go to Michaels for cheaper yarn and other basic things.
I can't believe the Hat doesn't have a yarn store! I think Lethbridge has 2 more besides Knitting Time and Michaels...but I like these 2 I know, so I haven't had too much of an urge to explore.