I just wrote my ebook using openoffice the other day, works better than acrobat professional in my opinion.
Using Open Office to create the pdf is a great FREE way to do it. I found this process a little confusing. I like this one: http://www.simplehtml2pdf.eproductsvault.com/ It's super simple, and there's only one thing to install. The $12.95 was worth it to me.