Heh, I remember checking the RS website constantly for when they updated the wallpapers. I always hated how they only had each one up for certain random amount of time, such a pain in the ass.
Anyway, here's the ones that I have. I'm pretty sure I'm missing some though and a lot of them aren't their highest-res that they made them at either (1280x1024). If anyone has the higher-res versions, that would be awesome.