65,535 - that is the limit of unique TCP/IP ports that's currently allowed on most systems (since port number is a 16-bit integer value) If multiple currencies overlap in port numbers, or if future coins use some other mechanism to connect to their peer networks you could always have more, .
In 2007, its founders were ranked as the second most generous philanthropists in America, and Warren Buffett the first. As of May 16, 2013, Bill Gates had donated US$28 billion to the foundation.
The $43.5bn trust is the largest philanthropic organisation in the world and is committed to the eradication of malaria and polio, and controlling the spread of tuberculosis and HIV. The north office building of the newly opened $500m Bill and Melinda Gates Foundation campus in Seattle, Washington, US. The Gates Foundation supports work in more than 100 countries in areas of health, development, and education. Photograph: Marcus Donner /Reuters