I used SPRY about a year ago to experiment with the fact that you could essentially load a "dataset" into Javascript/browser, and act upon that to bind to form fields like textboxes, combo dropdowns etc.
I really have been trying to find something really simple to allow me (a coder) to write the backend code to get the data, and my partner (who designs etc) to simply use her skills to layout the HTML, and have a simple way to bind data to those form values/grids etc.
I have tried experimenting with the likes of ExtJS and that type of thing, but find it a little hard to explain to my partner, whereas when I did use SPRY, it seemed quite "natural" to explain to my design partner how to use. The only issue with SPRY is that it seems to have either slowed right down (development that is) or something..
I love jQuery, but not sure if there is something that is similar out there?