[tomkat]

/smartass

Start here for quick reference:
http://spelling.wordpress.com/2007/04/15/basic-spelling-rules-double-the-final-consonant-rule/

Further resources via this search result:
http://www.google.com/search?q=rule+for+double+consonants

[tomkat]

oops .. /html rust

Start here for quick reference:
double-the-final-consonant-rule

Further resources via this search result:
rule+for+double+consonants