At first blush, this project is very exciting.<p>Persistent objects through JSON. No muss, no fuss. Lawnchair indeed!<p>[edit: Here is the github source directly: <a href="http://github.com/brianleroux/lawnchair" rel="nofollow">http://github.com/brianleroux/lawnchair</a> ]
This project does provide a very nice API and I think it can be very useful in some circumstances. However, I think client side storage is not as important as server storage. After all, a client can have many "client sides" and the appeal of storing stuff on the server is that all of them can be stateless and synchronized. I can see myself using this as a very nice cache mechanism for intermediate data, but the permanent storage would stay on the server.<p><IMHO>SQL is not gross!</IMHO>