The immense buzz when Mozilla open sourced Navigator/Firefox. The crazy first day of the IPO of VA Software (+698% above initial price!!!)
Tweaking settings to get the best X11+Enlightenment speed possible, although I decided I preferred WindowMaker. Feeling like Open Source and Linux would take over the world (It did, really). Developers conferences at Apple to discuss this crazy upcoming Unix-based MacOS. (one of the presenters made a joke about how easy it would be to install apps, you'd just open a terminal and run "/bin/install --etc" and laughed at the horror on the faces of the assembled Mac evangelists)
I feel like an old hippie, trying to tell people what Woodstock was like and why it was special, only to see their confusion and lack of really getting it.
Not much of a point to this comment, just a big old nostalgia bomb early in my morning :)