'Miss' isn't quite how I feel, but reminisce about:
- having access to BitNet in the pre-Internet days, when it was mind-blowing that you could contact someone electronically clear across the globe.
- bang-addressing your emails (when you had to actually know how you wanted to route them across the aether)
- playing Rogue and Hack way into the night on University computers because it was more fun than studying
- attending some of the first MacWorld Expo summer shows in Boston (before I developed a preference for PCs)
- having a dial-up account with Unix shell access on the world's 1st dialup ISP - Software Tool & Die (TheWorld.com). I was lucky enough to go to college with one of the founders.
- as mentioned before ... the screech of modems (300,1200,2400,9600,56K) ... got real good at figuring out what connection speed I was gonna get just by the sounds
- screwing around with 3rd party TCP/IP stacks before Microsoft provided their own

Gosh, the list could go on forever.