How many new TLDs ?

There might be 18,700, according to this source:

After years of research, a study by ABC Namebank, titled "The New-Name-Economy & 2010 Cyber Branding Strategies" finds there are already some 18,700 companies in the world today that will apply under this new policy, either by choice or forced by competitive elements to secure layers around their existing brand name identity. Based on their huge budgets, the suggested fee of $100,000 to $500,000 is easily affordable.

The Billion-Dollar Domain Babies, E-Commerce Times