Re: 50th Is "The Day Of The Doctor" (And Is 75 Minutes)
Much larger versions can be found here
And that's why I don't grab images from the official site anymore. The images they post are almost always greatly reduced in size.
Anyway, this blog
is a really good source for large versions of DW promotional images (I linked to another source above for these particular pics though because the images were of better quality there). He posts pretty much every official promotional image that comes out. It's also a decent source for Who news.
"Last night, Darth Vader came down from Planet Vulcan and told me that if I didn't take Lorraine out, that he'd melt my brain."