you should be able to get wall/ceiling mounts that screw into the same place the floor stands do.
you will obviously need to screw into the walls, but you won't have to modify the speakers in any way.
you could also just install a small shelf, and then place the speaker on the shelf
Displays: Samsung PN64F8500/JVC X35
AVR: Pioneer VSX-1018AH, 5.1 audio
Sources: HTPC(Mediabrowser), PS3, XBOX360, Wii, Sony DVP-CX995V
Control: Harmony One