[tmorgan]

Well, populations are typically modeled as a sigmoid function, they only appear to be growing exponentially. I think it's fair to assume total population will stabilise whilst we are still resource limited to Earth.

[jules]

It seems that we are at the inflection point of the sigmoid:

http://upload.wikimedia.org/wikipedia/commons/7/77/World-Pop...

[j_baker]

The last estimate I seem to find on the subject said that the population should level off at 10 billion in 2200. Granted, this is from 1999: http://www.un.org/esa/population/publications/sixbillion/six...

[shasta]

Reassuring to see that the UN doesn't predict any large discontinuities in that graph