If you're talking about more than Ambergris Caye, there are several sources. One is the Belize Tourist Board's Web site, which has virtually all hotels in Belize listed, most with e-mail addresses and Web URLs. Try
www.travelbelize.org. My Belize Book of Lists 2000 has most hotels listed in an appendix, with Web sites and e-mail. There's a share-ware downloadable version on our Web edition of Belize First Magazine.
--Lan Sluder
Belize First Magazine
http://www.turq.com/belizefirst/