Trek 630 • Jamis Quest • Bilenky Tourlite and various others
I'd use one of those bike powered pontoon boat rigs, that and maybe hold my jacket open to use as a sail if the wind serves. Couple 'a months should do it. Sleeping may become an issue, but hey, sleeping is over-rated anyway.
You neet really fat tyres. You run them at so low a pressure that they deform to take the shape of the waves, instead of punching through. Use Slime in the tubes to avoid flatting out on the icebergs. Oh, and pepper spray for the polar bears and sharks.