It should actually be
http://joshedwards.com/20100101_hangingsox.pngIt seemed to work for me after making that change. Also, it looks like some similiar Red Sox logos showed up in the search results too.
This logo thing is pretty cool at the start of a league but you can't really do much with it afterwards unless you decide to change some logos mid-season. It still, at least, provides a way to have team colors for all of the teams.
I came up with the idea after playing MLB the Show's Diamond Dynasty where you get to create your own team logo.