Jessica - Great info! My fiance (soon to be!) and I are thinking about St. Thomas. I looked at the Marriott (Frenchman's Reef) since my mom owns a Marriott timeshare and could trade in (provided there are no immense restrictions and such...blah!), it wouldn't cost my family much to stay there. However, I will definitely look to contacting a travel agent/wedding coordinator (like the one you suggested) to see what options are out there.
I never even thought about the cruise ship scenario! Hmmm...should look into that! I hear you, Amy, on the cost of flying to St. Thomas as opposed to Mexico. Ay Carumba!
Good luck, Catherine, on your planning! We're thinking of getting married in late May 2008 - perhaps we'll pass eachother by!