The Wikipedia article on Codex Sinaiticus has a link to a PDF of the facsimile of the NT portion of Codex Sinaiticus.
The pictures of the actual manuscript are appearing on the Codex Sinaiticus site, but they don’t have everything up yet and a PDF might be faster than a website. There are also a number of nice photos of the manuscript on the Center for the Study of New Testament Manuscripts page.
Enjoy!
I would like study the manuscripts
The link to the PDF is broken:
http://www.biblefacts.org/church/pdf/Codex%20Sinaiticus.pdf
…unfortunately.