But after this episode, we don't know as much about the smoke monster as we thought we did.

ALSO this: sMIBokey wants off the island the same way MIB wanted off the island. So, does smokey itself want off? Does Smocke really want off, or is it just residual memories of MIB? MIB was presented as a slighty evil but mostly sympathetic character... but I can't say it makes me think that Smocke is anything but evil. Unless Locke, who was good, starts to exert more control over Smocke and contains the beast long enough to instert him back into the sparkly glowy cave.