Interesting post. I would suggest a mod move this to tutorials.
I am using local storage to graph cloud end points from my system but never even thought of using it as part of phone gap. Thanks for sharing! Good to see I am not the only one thinking localstorage
I was wondering about graphing data when using polling say every 10 minutes or so. Local storage would make sense to keep the data while the page is open. If the page closes you would at least have saved the last entry.