With party season approaching, everyone needs to turn their attention to looking a bit smart once in a while, and when you have to wear that dress shirt to a formal occasion, but still want to retain your geek credentials, these cufflinks may do the trick.
1. Mens Steampunk Cufflinks Watch Movement with Gears Details

2. Industrial [...]

Found these while surfing around eBay today. I wear cufflinks about once a year, if that (and I already have a nice blue marble-effect pair) but if I wanted to wear something that, literally, symbolizes email and Twitter, I could do worse than this pair of @ links.