Vinay Raikar (@vsr) from mysore , India started tweetbook by which you can generate a e-book of your latest tweets and favorites. You can also download and share the tweetbook with your friends.
Tweetbook.in needs read-only (oAuth) access to your twitter account. By Clicking on the ‘Sign in with Twitter’ button there to give tweetbook.in the access to read your tweets and favorites.
When you give access to it, it will take you to its dashboard, from where you can have the option of downloading all your tweets, your replies and your favorites too. you can also download a xml backup file of above.
Tweetbook DashBoard
Just select, if you want replies and xml format and click on “Generate Pdf”.After few seconds, you can download the E-book.. How Easy isn’t it ?
Advantage :
The advantage of this is , they do not store your passwords. The app. uses oAuth which means you are not sharing your password but just giving them the permission to read your tweets. They store your tweets temporarily. The PDF and XML files that you generate there are deleted at the end of the day( or two).
Dis-advantage :
The only Dis-advantage is, twitter gives out your twitter updates through twitter API and it has limits set so that only a particular number(as of now latest 3200 tweets) of tweets can be retrieved. (Thank god , i just finished 3000 tweets, so i got all of my tweets 
)
@sparun Tweetbook
Enjoy Your E-Books
Popularity: 5% [?]
Sounds funny. Why would I make an e-book from a twitter? I usually just let them go and only save the important tweets
But it’s a great creativity I think.
Very cool service. I will use this weekly.