It appears that in anticipation of D&D Next Wizards of the Coast has removed much of the Dungeons and Dragons, 3rd Edition Web content. I didn't perform a thorough search to determine if all the content is removed (e.g. I know the Three Dragon Ante Web enhancement "Luck of the Draw" and the Mind's Eye column about psionic tattoos "Getting Wired" are both gone--better not to ask why those are my go-to articles), but it all might be.
What's the best way--and by best I mean both legal and convenient--to continue to access this content?