yeah you can wall mount them if you invert the plate with the legs attached, the use the two holes in the legs to mount to the wall... thats how i used to have them when my desk was in a bay-window type area. i recently moved, so now they have to be on speaker stands....
*edit* just to clarify, the legs are parallel to the desk regularly. when you flip the plate/legs, the legs are parallel to the wall. However, the plate that attaches to the speaker itself is attached at an angle.