Still messing with ASCII, DBCS, Unicode and Encoding?

The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!)
http://www.joelonsoftware.com/articles/Unicode.html
Unicode Technical Report #17 : Unicode Character Encoding Model
http://unicode.org/reports/tr17/

Tutorial: Character sets & encodings in XHTML, HTML and CSS
http://www.w3.org/International/tutorials/tutorial-char-enc/ 
Character Encoding and the Web
http://www.yale.edu/pclt/encoding/index.htm
UTF-8, UTF-16, UTF-32 & BOM
http://unicode.org/faq/utf_bom.html

Unicode Tools
http://www.unicodetools.com/