Almost fell off my chair
I would say you're number is conservative, but pretty close. The best estimates so far I've seen.There are 4,591,298(1,429,943 of them in the US) online poker players listed at the Univ. of Hamburg poker database. This is unclear, because many players have lots of screen names due to sites opening, closing and merging with other networks.
Here are the online poker player numbers for the planet combining all the networks:
jan2004 16,692
jan2005 40,448
jan2006 40,000 est
jan2007 62,284
jan2008 90,572
jan2009 103,300
jan2010 128,072
jan2011 120,789
jan2012 88,682
nov 2012 is the latest numbers 79,077
This information came from POKERHISTORY.EU
There is a shit load of online players. What i would like to know is how many players play with there own money not staked money.
Almost fell off my chair
The biggest poker room, Poker Stars had 50 million registered users on November 7th, 2012. The United States estimate of online players is around 13.5 million, which seems to be a pretty good estimate. Getting an exact number is virtually impossible due to players having accounts at different rooms or networks, deceased players accounts, players that lost interest, and multi-accounts.