Hey libthekwltr... here's a link (can't remember now how I found it... but it has the instructions for those coasters).
http://www.bethanyreynolds.com/coasters.html
I did some prowling around on that Grid site and found that if you go into the individual artists pictures... and click on one of the shapes on their page, you will find links on the right side (like Storyboard and Possibilities) and THERE is where they are hiding the patterns. Wouldn't it be nice if they'd use words like "free patterns" for those of us who are not savvy to their lingo?! I'm not trying to be snotty or mean... but knowing that new quilters will be coming to the site and may not know how to find things... maybe a short tutorial on how to use the site would be helpful.
Have fun! I know I will!
Snowhawk