I don't know if anyone's noticed, but the Art Gallery Archive, which held all the 3.0-3.5 edition art, is now gone. Wizards of the Coast is of course free to do as it wishes with its own material, but if they have taken it away for good, it saddens me. It was nice to have access to that art to use for my games.
If anyone knows where they moved it, please post that here, but I fear that they did not move it but instead deleted it.
some of it is archived here:
Interesting. Everything but the art. 
I would report it to customer service or tweet to Wizards_DnD – when I tweeted to them about problems with accessing 4e material in the archive pages, they responded almost immediately.
I'd like to also mention that lost between the 3.5e and 4e archives are the inter-edition issues of Dragon (360-363). These were all hosted online, and had a mixture of 3.5e stuff and 4e previews, and were generally very interesting (and included one of the great artwork pieces of a Shadar-kai too). These seem to have poofed.