According to my profile here, I joined BitCoinTalk (though I believe back then it was known as bitcoin.org) earlier than that:

January 31, 2011, 02:30:40 AM

I don't think I ever bought bitcoin, I only mined it and sold it, until altcoins came along so that sometimes I old an alt for bitcoin in the process of market-making for the alt.

Cannot recall if bitcoin.org was my initial discovery of bitcoin or if I stumbled upon it somewhere else first, at the time I was searching for free open source code that could be helpful in building a trading layer (trade X number of thing Y at place Z for A number of thing B at place C) to get working first before later presumably adding a transport baron layer to add on actually being able to relocate the things from place to place.

Bitcoin seemed a potential way to bypass my Digitalis D'ydii Cluster's assumption that all currencies need be local, only actual cargo being transported from planet to planet thus only needing one currency field in the starships showing balance of the local currency, remainder left as a 'tip' to the starport upon leaving with actual cargo to another starsystem.

It does seem likely though that google found for me bitcoin.org first or very early in that searching process.

-MarkM-