how come the homestar runner website didn't update in nearly a year?

Well if wewe check on Wiki it says

"Since November 2009, there have been only three major sasisho to the website, the last update being April 12, 2010 with a main page for Xeriously Forxe, an April Fools cartoon. On September 7, 2010 (approximately five months after the last), another update was added, this time for a discount sale on the site's store. According to a post on the RSS feed on December 1, 2009, the Chapman brothers announced the birth of another child and stated that this new child will affect future updates"

probes they are buisy makin a toon

Well,on April 1st of 2014,they made a joke toon [not accesable kwa menu].