JavaScript Date Ago

In case you hadn't noticed, one of the hip things to do with user-visible timestamps these days is to format them as a how long ago the time was. Instead of seeing a date and time like "08/02/2009 2:41 PM PST," these so-called passed/relative/pretty/friendly dates appear like "2 hours ago" or "1 week ago." Being a hip person myself (hah), I've written a few bytes of code to get these type of dates. One is JavaScript (here), and another is a C# clas