Hey Kent,
When I first heard about standup talking to guys out in Hawaii in 2006*, they talked about doing downwinders. That is long paddles, 5 to 8 miles sort of downwind and out in the wind swells. They would do it in a group as a social thing of sorts. Today's a bit strong but doable running south to north. You could do some interesting point to point stuff in Biscayne Bay or down Miami Beach.
Here's an idea how about circumnavigating Virginia Key (about 6 miles) or Key Biscayne (about 11 miles)? You would need to time the tides but it could be a blast. What do you think?
*
http://fksa.org/showthread.php?t=3841&highlight=standup