St. Lucia. Could be good for tourism domain. Where are you looking at these names and how much are we talking. If you take a look at it on Google Maps, you'll see that it appears to be a "paradise" type island.
Searching St. Lucia on Google will result in this.
Depending on the price, I'd say for tourism domains, go for it -- that is, if you can find a decent one.
When they opened it up last year, I went straight for travel.lc, but the registry had already reserved that, plus a bunch of other nice keywords for itself (see also)
At $75pa, I'd personally only get one for developing a St.Lucia-specific site (most probably tourism-related as Steve above has suggested)