To get the demo data for the up and coming noupe.com "Create a Twitter App" tutorial you can do the following.

From the command line, you can grab the code from git hub:
git clone git://github.com/overture8/Twitter-Blog-Demo.git
If you don't have Git Installed!
Download the code from here and extract it into a folder. Some Simple Configuration Steps
Next, you'll need to update the database.yml file, in the /config folder. Change the password as required.
Now, run some rake commands from the command prompt to create and migrate the database:
> rake db:create
> rake db:migrate
After this is complete you can start up the server to make sure it's all working:
> ruby script/server
That's it! Any questions or issues feel free to leave a comment and I'll get back to you.