Saltydog (Rich I believe?),
Nat Moody is another guy you might talk to up at First Light Anglers in Manchester, MA. He runs a Silverhawk out to the Bank and has tangled with tuna on the fly. I usually get out there 6-12 times a year with a friend who also runs out of Manchester. We usually troll for tuna or bait for sharks, but I just acquired a Penn 13-15 wt. for very short $$$ and plan on doing some similar experimenting with blue sharks and hopefully some other blue species this summer, so let me know if you want to compare notes.
Looking forward to expanding my horizons a little. What boat will you be running out there?