A company called American Feeder Lines has announced that they will be initiating a Halifax/Portland, Maine/ Boston container feeder service "in the second half of the second quarter" of 2011.
The line will use a Jones Act (i.e. US owned, US built, US flag[added]) ship with 1300 TEU capacity - that is as soon as they find one.
They have also apparently signed letters of intent with two US shipyards for a total of ten such feeder ships to operate on the US east coast between various ports.
There seems to be some historic connection between some of the proponents and HAPAG-Lloyd, and their press release refers to the feeder ship Yankee Clipper which HAPAG-Lloyd operated a similar route from 1980 to 1993.
Press coverage as follows: