I have those too and would like to know what they are. They are not seeming to do any harm and I can keep them down with a soap/cinnamon soak.(but not eliminate them)
Nick
I did some digging online and I think what I have is book lice. The description matched what I have perfectly, and I think it's from a mini-rose plant that I recently purchased. I quickly put it outside, and I think as I allow my medium to dry out it should take care of them. I went to look at them again, and couldn't find a one, so I don't think I'll have much of a problem. Check it out, and see if it matches your case as well