Big news for fans of scripts and character sets, Unicode 5.1 is out.
* Additions to Malayalam and Myanmar; characters to complete sup****t of
Indic scripts
* New symbols: Mahjong, editorial punctuation marks, significant
additions for math
* Capital Sharp S for German
* Some new minority scripts for communities in Vietnam, Indonesia,
India, Africa
* Some historic scripts and punctuation marks
See http://www.unicode.org/versions/Unicode5.1.0/
for details.
BTW, Blissymbols (an ideographic conlang) is in the pipeline to be
added to Unicode someday. ->
http://std.dkuug.dk/JTC1/SC2/WG2/docs/n1866.pdf