I picked up a 2011 Sun Bicycles catalog from the LBS a few weeks ago and never bothered to look through it completely until today. It looks like Trek/Fisher won't be the only company debuting a new cargo bike in 2011!
This one is 4130 chromoly, has disc tabs, and takes Xtracycle bags. I couldn't find much about it on the internets except for some pics from Interbike, and Sun doesn't list it on their website.
This one is supposed to retail around $550, which makes me wonder if it has any name-brand components on it at all. The catalog doesn't name names, so I suppose I answered my own question there...
I'm going to call the LBS where I picked up the catalog and find out when it will be available.
From the catalog: