Number three:
[flv width=”640″ height=”480″]http://tancos.net/flv/wp-content/uploads/ExcelEnd.flv[/flv]
Excel Saga, “Menchi Aishou no Bolero” by Excel Girls. I’m not posting the clean version because the words matter, and because some who frequent this corner of the otakusphere might recognize one of the names in the credits.
Ahaha. This ED was the answer to the bonus question.
I presume this is what you meant to link to.
—Don