Minke - Some Minke seem interested in us
I once observed a Minke breaching to observe me at about 2 meters eye to eye after I emitted a few whistles underwater (at very low power).
The Minke, with the Humpback, may be the few baleen whales species that may have sufficient interest in us, puny Homo sapiens, to try to communicate with us, if we ever get our act together.
Here's a good page from the BBC on Minke with links to other species.
Update 2007.03.03: Minkes may be the source of the mysterious "boing" sounds acquired in the Pacific over the years.