We have long been inspired by http://bitcoinrichlist.com/ and have always wanted to generate a rich list of the top entities/address clusters (closures in our terminology) as opposed to single addresses. At http://bitcoinprivacy.net/index.php/richlist.html you can check out our results:
You can find the traditional address top 100 next to our unique closure top 100 of address clusters that seem to belong to the same entity (read the FAQ for details!). Note that unlike http://bitcoinrichlist.com/, our list stays almost up-to-date (as the complete site)! Moreover, if you compare the two sites, you will find that the addresses differ in some places (such as No 1 and 3). That is because we correctly identify and display multi signature addresses. As you can see, the age of multi signature has arrived in the top 100!