As you may have noticed, Codex Sinaiticus (or parts of it) is now on-line here. Apparently, as the web-site was launched too many people tried to access the page. People trying to log in got the following message:
"Too many concurrent connections (> 100.000). The manuscript page is temporarily unavailable. Please try again later."
John Hobbins notified me of his review of the website on his blog Ancient Hebrew Poetry here.