Hi,
I just developed a site to track your portfolios in a simple way:
http://coinfinance.comWe're tracking more than 100 currencies at the time, and adding more constantly.
You can use it for know your wealth progress in BTC, USD, EUR or CYN
Your site is very impressive looking, great job! I'm curious as to why you didn't just take the top 100 currencies off CoinMarketcap and what criteria you used to choose the coins?
It's nice to see everyone still smiling with their long lists of coins. Some of you may want to check this out:
http://www.hoardersanonymous.org/ 
I'm glad you like it.
About your question, the market cap rank is calculated using the total currency supplied at the moment multiplied by the last price.