Actually my wife came across something while she was traveling the other day and it made us want to look into it. We (and a bunch of our friends) love Key West and we've been trying to get them to the BVI's. But schedules and flight costs have kind of limited our ability to get a consensus.
From Philly we can get cheap flights to either Miami or Ft Lauderdale so that would help for cost. Also, an itinerary that would take us from Miami to Key West and back over 10 days would allow some crew who don't have 10 days to fly and meet us around Isla Morada or Key Largo or something like that.
Not something we're fixed on but it seemed like a fun trip, different from our normal BVI trip and flexible enough to attract some new crew. At least worth doing some research.
We were told Moorings has a spot in Miami but we didn't see anything on their site. Googling brought up a couple more things but it would be nice to hear from anyone who's done it. We'd even look to go out of the Ft Myers area if there was a reputable charter company up there.