Several people have asked for the cat mat pattern. Unfortunately I don't know where I copied it from and I can't find the pattern anymore. But I will copy the pattern from the quilt itself and scan it on Tuesday, when I'm back in the office and post it here.
I found a link to a video tutorial for the hollow cube in a different thread here on the forum:
http://www.5min.com/Video/Hollow-Cub...Block-91186943
I hope this helps.