Unicode version 6 is released in 2010 October.
This version adds 2088 characters. One thing interesting is that it adds about 608 emoticons, with names such as GRINNING CAT FACE WITH SMILING EYES 😸.
Apparently, emoticons are widely used in Japan in mobile phones, and it's called Emoji.
Unicode 6 is nice in that it added many symbols i was looking for but unable to find before. The following are all from Unicode 6:
⏯ ⏩ ⏪ ⏭ ⏮ 👍 👎
Unicode Emoticons, Faces 😃 😄 😱 😸 👸 👽 👍
The following fonts supports many symbols new in Unicode 6.
Symbola, a high quality free font. Download at symbola_font_7.12_2013.zip. Original source: 〔Unicode Fonts for Ancient Scripts By George Douros. @ http://users.teilar.gr/~g1951d/〕.
Segoe UI Symbol is from Microsoft (in a Microsoft 7 update on ).
Emoji font from Apple, in OS X 10.7 (Lion) (released on )
Linux: How to Install Font
For general purpose Unicode fonts, see: Best Unicode Fonts for Programing.
For typing Unicode in emacs, see: Emacs and Unicode Tips.