I moved across the world (from Perth, WA) to work on open source software with some of my heroes (Bud Tribble, Andy Hertzfeld, Susan Kare) at Eazel. It was only a short time run, but I'm still in the Bay Area, still friends with many of the people I met there.
And I still use the software that I worked on at Eazel most days, which I can't say for anything I worked on since then.