That's a pretty good list. Check on the manta dives before you put out the money and sign up. When I was last there a couple of months ago they weren't showing up because some researcher was putting tags on them. The dive companies were pretty ticked because he was taking advantage of the lighting systems they had set up to do his thing while ruining their business.

You can also kayak in the area where the mantas come. There are some small cliffs there you can jump off of. You can also kayak from Place of Refuge to Captain Cook's Monument. There's some pretty good snorkeling over there.

Pick up chocolate banana bread on the way to the green sand. You'll see the signs. I forget the name of the little deli on the right as you're heading south.

If you're going in the winter, look for whales.

Some art galleries to check out over in the towns near Flumin' the Ditch.

Eat at Daniel Thiebaut, Merriman's, Oodles of Noodles and Keei Cafe, if you get that way. Go early to Merriman's and/or Thiebaut's (they're real close to each other) and check out the shops over there. There's a couple of good vintage Hawaiiana shops. Kona Brewing Company has good beer and pizza.

You can get massages for $25 an hour from the massage school south of Kona. You need an appointment and they only offer it a few days a week.

If you like beaches, get a four-wheel drive and just turn off the highway wherever you see a road through the lava. There are some great empty beaches if you're willing to drive over the lava and then walk a bit. Also lots of turtles at the beach just north of the marina. You drive into the marina in Kona, go to the back, park and walk north.