Xah Lee, , โฆ,
Unicode version 6 is released in 2010-10.
This version adds 2088 chars. One thing interesting is that it adds about 608 emoticons, with names such as GRINNING CAT FACE WITH SMILING EYES ๐ธ. You can see them at: U60-1F600.pdf.
Apparently, emoticons are widely used in Japan in mobile phones, and it's called Emoji. There's a FAQ about it here: Emoji and Dingbats @ www.unicode.org.
See also Emoticons for history and rich variations.
Unicode 6 is nice in that it added many symbols i was looking for but unable to find before. I think the following are all from Unicode 6:
The official site for Unicode 6 is at http://www.unicode.org/versions/Unicode6.0.0/.
Symbola is a font that supports many Unicode 6 symbols. Get it at:
For general purpose Unicode fonts, see: Best Fonts for Unicode.
For typing Unicode in emacs, see: Emacs and Unicode Tips.