Hey, quicksilver. It went great - I didn't see most of these suggestions, since they were posted the day of, and I was cleaning and then out shopping all morning, and cooking most of the afternoon.
For an appetizer, I marinated canteloupe balls in sherry vinegar, olive oil, one sliced hot red pepper, and S&P, then topped them with pieces of prosciutto (couldn't find serrano ham) - a combo of KitchenElf's suggestion and something I found on the La Tienda site. They were a hit
Then I made the tomato salad as I mentioned above, and we had the paella with shrimp, lobster and clams (mussels were only available in 3-lb. bags, so I didn't get any and doubled the clams). Then I took it easy and asked a friend to bring dessert - she brought lemon-poppyseed cake and rocky road ice cream.
I have enough of the basic ingredients (saffron, Spanish short-grain rice, olive oil) left to make another batch, so I'll incorporate more of these ideas next time. Thanks so much, everyone, for your suggestions
The only pic I got is of the paella: