Alright due to a large number of requests, I've removed Ripple from the main page.  You can still see long term charts for it at http://coinmarketcap.com/xrp_30.html

If you want a certain coin added, please give a link to a working block explorer.  A block crawler such as http://www.grandcoin.org/blocks/ is not sufficient since it only gives block count information (AFAIK), and block reward usually changes over time.

Thanks for all the feedback!  Still working on more improvements.