How many external displays does the 15 inch support?

I spend 90% of my time at a desk developing, using multiple monitors.  My current Windows system can support up to 4 displays, normally I run with 3.  I was wondering how many external displays one can hook up to the 2.3GHz Macbook Pro.  I need at least 3 displays while still having a thunderbold for external drives and eithernet.  Does the Mini DisplayPort to Dual-Link DVI Adapter allow splitting the single to two different monitors?  Other then the Thunderbolt display, is there a way to get multiple monitors out of one Thunderbolt port?

From http://support.apple.com/kb/SP690 -> "Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on up to two external displays, both at millions of colors".
But there may be ways of driving three monitors - maybe someone with a Retina Display model will jump in. I know that on my 15" 2011 model, I can only drive two Apple Thunderbolt Displays.
Good luck,
Clinton

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