Today there're different sorts of text-based smileys on the Internet: Japanese [ ^_^ ], typical [ :) ], Russian [ ))))) ], etc... But neither of those are perfect. It's either too many symbols or you have to turn your head 90 degrees in order to read it.
Recently, I've got a request from one very big and very powerful association of Internet users to invent something new, something simple yet beautiful. Something, that would consist of only one symbol, but at the same time would be capable of representing an emotion. I had to think long and hard. "What kind of symbol could do that?" -- I've asked myself.
[ I'm going to finish this part some other time... ]
And there it was: Ümlauts! Eureka! The biggest smile ever you can give on the internet is this: Ü (or this: ü);
If you're very surprised you can just use this symbol: Ö (or ö); I couldn't find any use for this pair yet: Ä ä, but I'm pretty sure that something stands behind it... pretty sure.
And that's it: you no longer have to angle your head or type in numerious combnations of symbols!
If you don't have a Deutsch keyboard layout and you're using Windows, then simply hold the Alt key, and enter this code on your NumPad: 0252 (or 129 for this little guy: ü).
It's R-Alt + Y on Colemak.