I got a few SCP ideas yesterday while reading, as I stated in my intro, and thought that I would run them through to see general opinion (I even took a look at the list at the worked to death cliches for extra measure).
My first idea involves and black and purple, glowing orb from another dimension. What it does is mutate and corrupt anything and everything around it (kinda makes a demonic version of something). but there are nine other objects surrounding it that keep its effects contained, as well as two temples on either side of it, and a large volcano with a strange symbol on it. (not gonna go into full-ish detail just yet). (BTW, the orb is part of a creature.)
New second idea: A giant spider/scorpion hybrid (slightly based off of the scorpion-tailed spider (an actual animal, but with no stinger: http://en.wikipedia.org/wiki/Arachnura)).