Probably not many websites were dedicated to discuss about vintage/retro or classic gadgets. I just found a website which just great about classic gadgets, where its articles discusses machines like the original Apple Macintosh, the world's first computer mouse, or Sony Walkman and the first motorola's mobile phone.
There is a lot of knowledge here. So if you want to reminisce with your old gadgets that may have been lost (or perhaps looking for a collection of old/retro gadgets), visit the Classic Geek Gadgets website