Today I was working on getting a twitter site feed up in JavaScript and now it is running on my home page and I have a demo here. The downside is that each page can only display each user once so far. The code is here if you want to use it with jQuery.
network
Net DataBase in javascript
I do not know who cares but I have had this for some time. It is a small network database in JavaScript. It is base on Taffydb. It syncs the data through the freewebs jjax base shout box system. I do not know what the limit is on the data base, I think that at some point freewebs would turn of your shout box but I do not know. I have a demo here. Your name is enter in to the data base. You could also use globalStorage to save some data on the clients computer. Because all of the data is over HTTP Get request I think that each cell would have about a 500 bite limit.