I think we're going in circles again... reviewing a whole set of ideas is a lot of admin work
I meant really quickly browse through the titles and mark suggestions which already exist, this should take like 5 minutes. But ok, forget about the initial review.
I'm not sure a limited voting period is that useful either - I suspect lots of users come and go, and having just say one or two weeks to accept votes means a lot of passer-by type users won't be counted.
With limited amount of votes people will run out of votes long before the end of the period! Ideas posted in the first week will receive tons of votes, ideas posted in the last week will receive none. A limited voting period will ensure that all ideas receive equal attention.
And what do you think about picking N top ideas from each category??