Photos of Codex Vaticanus are now available online here: http://digi.vatlib.i...MSS_Vat.gr.1209
I discovered this yesterday thanks to Ancient Jew Review (via Twitter), who pointed to Ancient World Online, who pointed to the Vatican/Heidelberg page. If you're doing the Greek Psalms in a year and want to have a look, here's a link to the first page of Psalms.
Someone was on the ball updating the Wikipedia page for Codex Vaticanus with a link, too, but I've not been able to find much info about the project, whether they intend to add transcription, etc. At the moment it looks like it is only photos of the codex (but of the actual manuscript, not of an old facsimile).