Is this possibly some sort of permalinks issue on your site? Was your site always setup with this domain or was it URL at
http://yoursite.com/wordpress/ and then you switched the domain when you took the site live? — After making the change, did you re-save your permalink settings? What happens if you disable permalinks all together? Settings > Permalinks
Your site takes awhile to load, but it does work; I can click to the next page and page #2 of posts does display: http://www.renzotondo.it/wordpress/page/2/ — but it still appears the permalink settings or site URL settings aren’t fully correct.