After attempting to make a rather complicated pattern with the 0.1 version. I found myself copy-and-pasting hex values all over the place. It worked but it was tedious. It also made for extremely long URLs which have a finite character limit.
The new 0.2 version features a color pallet and separate inputs for each color chunk. This makes it easier to add chunks in the middle of an existing pattern. It also lets you change up the color scheme without having to muck with a gigantic string.
Up next: YUI color picker and saving.