Fortunately Jamaica was not hit as bad as it could have been. Kinston I hear got the brunt of it.
On the issue of cruising I think its a good question. I was there in April for a conference and was looking for any place to rent a boat for a day. Could not find one, even with the help from this Sailnet! I ended up renting a Hobie 14 for a few hours...
There does'nt seem to be much infrastructure and I've also heard that crime can be an issue (although on the North shore I cannot see how that could be with all the touristy all-inclusive hotels...).
But again with all of the places to choose from in the Caribbean and the fact tha Jamaica is off the beaten track (probably the no 1 issue), there are many easier alternatives.
Now based in Barbados.... and wait for it.....the boat is too!
Waymar - Jeanneau, Attalia