Since ESRI's Javascript framework doesn't support attribute editing I separated the data from the features. I put the attribute data inside Google Spreadsheets, which I found out does not have a record limit.
The project is made up of 2 apps. The front end which consist of html, jQuery and ESRI's JSAPI Framework. Then the server side piece which I used ASP.NET MVC, TweetSharp library and Google's Spreedsheet API.
The project came together really well and took 2 weeks of late nights.
Here is a presentation I did on it
Tweet Gis
View more presentations from DonnyV.
Demo
Source Code