XTech 2006 was the first conference I attended. I was blown away by most of the talks. I presented CarCulatr, a mobile app based on web technology, during a lightning talks session.
image credit: Jeremy on flickr
Jeremy Keith talked to me after the sessions and he was kind enough to take me drinking with some quite famous people.
I also met Brian Suda, Mike Smith - back then working for Opera - he gave me an "I open the WEB" T-Shirt. Mike also introduced me to Håkon Wium Lie, CTO at Opera.
Meeting all these people was my main take away I guess, along with learning a lot and knowing I could present stuff at conferences. Amsterdam is great too, but that I knew before.