I was thinking about creating an online community based book library management system for long time and I was partially successful in creating such system as you may have seen at SVTechie Book Club.

Though SVTechie Book Club is in itself is complete but I am thinking about new set of features. I started with following features in mind

• Sharing - people can share and exchange books.
• Flexibility - People can list books for reference only and indicate if do not want to share
• Flow control - Credit mechanism to facilitate equitable book sharing mechanism
• Safety - Referral based membership and admin approval for membership and each book additions.
  
• Ease of use - Extensive control panel to perform book management. Easy addition of books etc.
  

Current System does support all of the above features except in hindsight, I feel that some of the features may not be needed 

• Sharing - Except third world countries and students, general audience may not want to share books. If they want to get book, go to library.
• Safety - Referral based membership creates initial membership hurdle and creates unnecessary steps in registration process.
• Ease of use - some of the features require compromise on usability.
  

I am thinking about following modifications

• Template change - Make use of space and compact menu system
• Registration/Login - Direct membership into book club and one step simplified registration process on book club main page
• Book Addition - No approval required to add books. Compact DHTML based book addition. Add library of congress to addition search. (Simple ISBN based system)
• Groups mechanism - User group system. User can create groups and can decide if it is book share, exchange or reader's club. Inherent support for all three of above systems.
• Invitation and connect - Users with similar books & interests are connected together and invite them to create reader's club.
• Categories - this I am not sure of. Should categories be extensive or simplified few categories (as now)? Any suggestion! 

What do you feel about these features.. any suggestion, comment etc.