Wizards seems to release hi-res art all over the place and it's hard to find out about it all. I'm hoping maybe there's a better location that lists/catalogs/links to anything that gets found.

The only place I know to check for hi-res art updates are the wallpaper of the week (though the actual list doesn't seem to get updated sometimes), and I just found out about all the art in the Guild Fan Kits, and via some reverse image searching I found this forum post with links to other hi-res:

Dimir Selesnya Gruul Boros Golgari Izzet Azorius Rakdos Orzhov Simic

And then these:
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18

I get the impression that several of those are Rewards for something and probably weren't intended for mass-release, and admittedly, several of those are alternate versions found elsewhere, but they're still nice to have. (and I really like that Orzhov church one, #16)

TL;DR: Is there a blog, or something, where all the nice art releases get listed and linked to, so I can not worry about all the art I'm missing out on?

Edit: Missed the Dimir one. On related note: It makes me really sad when they stick those giant borders over the art. And I reallllly don't like the RTR graphic they picked. :(

Edit2: Thanks to CopySix I found these. More amazing world art, from Richard Wright, and one of Ral Zarek. I'd love to see any other out of the way releases that I might have missed. (If it wasn't in the wallpaper of the week, or I haven't mentioned it above, I probably haven't seen it).