Viacheslav Slavinsky created a DEC VT 220 truetype font so you can take a nostalgic trip down memory lane when using Terminal. Just download the font, double-click and install in Font Book. Then go into terminal, duplicate your current profile in preferences and change the font. Size 20 works best on Macs. Change the color to green and we're walking back down memory lane. Or change it to any color you want :)
Thanks to Simon for the tip.