Months behind but I figured I'd chime in for future reference. I just started a consulting gig so have explored a little.

I've been to riverwalk in downtown and I'd recommend it too. I've also eaten at Blue Bamboo and enjoyed the Dim Sum.

For a strange recommendation, about 30 minutes SE of the airport just off route 9A is St Johns Town Center. Outdoor style shopping center that is a sure way to use some time. Took Mrs 900AT 4 hours to get from one end to the other. I'm sure there is a web site for anyone curious.

Have not made it to the outlets north of St Aug yet but will check it out one of these days.

For pure peace and quiet, just south of St Aug on A1A is Matanzas. I was there a while back and for a few dollars ($3 when I last visited) you can drive your car right up to the ocean on the hard packed sand and watch the world go by. FYI, don't fall asleep if you like being near the waves ;-)