Wow...I didn't realize you were so close. The store is Country Sampler at 120th and Center on the north side of Center next to Burger King. The pattern is called Guilty as Charged and you can get all 3 clues (so far) at the cutting desk towards the back left side of the store.
The pattern they are doing is free and they are hoping you want to spend a mint on their high dollar material. I got all my material at Walmart, but I dutifully go every 2 weeks to get my clue. I can't wait until next spring when they do the BOM. Their fabrics are such high quality and it's 5.00 for the year if you keep up. They always end up so pretty!!
Feel free to pm me if you need anything. If you like Chinese there's a good chinese place with a make-your-own grill just east of the shop (next to JoAnn's fabrics) at 85th and Center. I don't think the Country Sampler is doing the same mystery quilt. It wasn't really clear in their newsletter. If you have any problems getting the back clues let me know.
M