Due to her children's health problems, Laura Harms' has delayed this weeks Weekly Challenge #52. (Here's the link to her announcement if you want to go and wish her well).
If that makes you panic, at the thought of not having a challenge, lol, Sue Jacobs issued a challenge a while back to use every letter in the alphabet in a zentangle. She's up to 'U' already, but I don't think there is time limit so don't be afraid to join in, if you haven't already. Sue's done some outstanding examples at her blog.
And all I can say is that if you accept her challenge, you'll love me when you get to the 'Z's, lol!