Firstly, it might be worth checking out this thread
which has lots of useful information and photos from people who've stayed there.
I'm not sure I'll be much help with activities, as we visited in December and it was very cold, with not much going on. I can tell you that the beach was absolutely beautiful and it was very relaxing, albeit very cold [img]/ubb/images/graemlins/grin.gif[/img] to walk along it. The pool looked nice, but I didn't sample it.
Elsewhere in the resort, don't miss Sonya's and especially their seafood buffet on Sunday and Thursday evenings. That was one of my highlights of our visit there - it was so good. [img]/ubb/images/graemlins/waytogo.gif[/img]
Outside of the resort, we visited Riverside Park in Vero Beach. There, we found the Memorial Island, an area paying tribute to those who gave their lives for their county. It's a very quiet place to be, offering you time to think. It's also a great place for views to the mainland and local wildlife - while there, we saw eagles and pelicans. Riverside Park also has a Museum of Art, although we didn't visit it.
For food, I can thoroughly recommend the Ocean Grill on the ocean front. The food is excellent and the views superb. If you go there, you must try their famous crab burgers. [img]/ubb/images/graemlins/yuma.gif[/img]