yep, the permissions thing is planned, as is a max # of polls per person per week or so, to stop people from going poll crazy (all this will be done via the control panel)

the poll as reply thing would be kinds useless, maybe a max 1 poll per thread or so.

you can already limit the number of options in the poll via the control panel on my current version, I just finished the check if you have voted or not.

putting the remarks on my todo list (tm)