Sailing this January 10-17 to San Juan,St. Thomas(Charlotte Amalie),St. Marteen(Phillipsburg), St.John's Antigua,Castries,St.Lucia and Brigetown,Barbados. Seems like a lot,so I am trying to cull the best sites to see and things to do.
Any ideas would be reatly appreciated.

Are you starting in SJ? If so go about two days early or stay two days post cruise if possible. There is a ton to see there. Is this on RCI? We did this initerary last May-June on the AOS. I can recommend some excellent tour guides for Antigua, St. Maarten and St. Lucia. For St. Lucia try Spencer Ambrose. I can't say enough good things about him:
http://www.splendidtours.fusiveweb.co.uk/
For Antigua another top notch guy is Gordon:
[email protected]. He starts hos tour at the local market where he buys whatever fresh produce you would like to try.

For St. Maarten my fav island email this gal:
http://www.joyceprince.com/
All three provided excellent service and can advise you about sites to see based on your personal interests. All will have a cooler with refreshments as well, all complimentary.
Personally we preferred Nelsons Dockyard in Antigua. St. Lucia has nice beaches and alot of natural beauty but be advised that the roads are very winding so if you are prone to motion sickness this may not be a good thing for you. You may want to just get to a beach and relax.
In Barbados we met a splendid tour operator who showed us a great time. We got on insiders view of the island and he even took us to his sisters restaurant and his home. His name is George and you can reach him at 246 824 7173.
In SJ, if the time is limited try seeing the old Spanish fort El Morro and then shop in Old SJ. However if you can do try to spend more time there. Its worth it. Any questions please just ask. Larry

A few suggestions:

If you like the beach, go to St. John when you are in St. Thomas. Get the ferry from Redhook over, then take the "Jungle Bus" to Trunk Bay. One of the most beautiful beaches and best snorkelling around.

In St Martin, racing the America's Cup boats is a blast. They take 20 non-sailors and give them jobs on the boat, and you actually race FAST against another boat.

In Antigua, taking a tour to Nelson's Dockyard and up to Shirley Heights is nice---not fond of the downtown area.

In St. Lucia, there's several tours of the island. My husband prefers touring the golf course there. Of course, he prefers golfing everywhere!

In Barbados, it's the beach again, the beaches are beautiful. It's a large, busy island, so I'd go to the beach.

I,m sure your cruise line will have tours to all of these places.

If shopping is on your mind, St. Thomas and St. Martin are the best on your list, but personally I wouldn't give up the beach or sailing to do it. Pop in a few shops on the way.

Bon Voyage!

Also if they are several ships in port on the day you are in St. martin expect ALOT of traffic jams. Personally I would skip the ships tour and go with a private operator. It will be less money, fewer people and you can tailor it to your liking.

There was a great feature in September's National Geographic Traveler (Classic San Francisco was on the cover). On page 58, they have discuss a walking tour of San Juan that you can do on your own. It takes a few hours and you will see all of the highlights for $0. Also, I came across a good crusie website that has ship reviews and you can also add your own review post cruise. Have fun.
http://www.liquidatlas.com